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2023
Comparison and commutability study among four faecal immunochemical tests (FIT) systemsDeprez L, Piggott C, van der Hagen EAE, Frasa M, Benton SC; IFCC working group on Fecal Immunochemical Testing (WG FIT). Comparison and commutability study among four faecal immunochemical tests (FIT) systems. Clin Chem Lab Med. 2023 Jun 19. doi: 10.1515/cclm-2023-0278. Epub ahead of print. PMID: 37327361.
Albumin determined by bromocresol green leads to erroneous results in routine evaluation of patients with chronic kidney diseasevan Schrojenstein Lantman M, van de Logt AE, Prudon-Rosmulder E, Langelaan M, Demir AY, Kurstjens S, van der Horst A, Kuypers A, Greuter A, Kootstra-Ros J, van der Hagen E, Oostendorp M, de Beer R, Ramakers C, Bakkeren D, Lindeboom F, van de Wijngaart D, Thelen M, Wetzels J, van Berkel M. Albumin determined by bromocresol green leads to erroneous results in routine evaluation of patients with chronic kidney disease. Clin Chem Lab Med. 2023 Jul 4. doi: 10.1515/cclm-2023-0463. Epub ahead of print. PMID: 37401696.
An International External Quality Assessment Scheme to Assess the
Diagnostic Performance of Polymerase Chain Reaction Detection of
Acanthamoeba KeratitisSarink MJ, Koelewijn R, Stelma F, Kortbeek T, van Lieshout L, Smit PW, Tielens AGM, van Hellemond JJ. An International External Quality Assessment Scheme to Assess the Diagnostic Performance of Polymerase Chain Reaction Detection of Acanthamoeba Keratitis. Cornea. 2023 Aug 1;42(8):1027-1033. doi: 10.1097/ICO.0000000000003275. Epub 2023 May 4. PMID: 37155347; PMCID: PMC10306335.
Reply to "Accuracy of determination of free light chains (Kappa and
Lambda) in plasma and serum by Swedish laboratories as monitored by
external quality assessment"de Kat Angelino CM, Jacobs JFM. Reply to "Accuracy of determination of free light chains (Kappa and Lambda) in plasma and serum by Swedish laboratories as monitored by external quality assessment". Clin Biochem. 2023 Feb;112:73-74. doi: 10.1016/j.clinbiochem.2022.12.008. Epub 2022 Dec 9. PMID: 36509148.
LC-MS/MS in clinical chemistry: Did it live up to its promise?: Consideration from the Dutch EQAS organisationLentjes EGWM, Bui HN, Ruhaak LR, Kema IP, Coene KLM, van den Ouweland JMW. LC-MS/MS in clinical chemistry: Did it live up to its promise?: Consideration from the Dutch EQAS organisation. Clin Chim Acta. 2023 Jun 1;546:117391. doi: 10.1016/j.cca.2023.117391. Epub 2023 May 15. PMID: 37196897.
Busulfan Interlaboratory Proficiency Testing Program Revealed Worldwide Errors in Drug Quantitation and Dose RecommendationsKweekel DM, McCune JS, Punt AM, van Luin M, Franssen EJF. Busulfan Interlaboratory Proficiency Testing Program Revealed Worldwide Errors in Drug Quantitation and Dose Recommendations. Ther Drug Monit. 2023 May 12. doi: 10.1097/FTD.0000000000001107. Epub ahead of print. PMID: 37199431.
2022
External quality assessment providers' services appear to more impact the immunohaematology performance of laboratories than national
regulatory and economic conditionsBuchta C, Coucke W, Huf W, Griesmacher A, Müller MM, Mayr WR, Flesland Ø, Politis C, Wiersum-Osselton J, Aburto A, Badrick T, Bouacida L, Budina M, Duenas JA, Geilenkeuser WJ, Guimarães AVP, Hecimovic A, Jutzi M, Lee CK, Lim YA, Mammen J, Molnár PM, Mokhtari A, Morabito G, Muñiz-Diaz E, Niekerk T, Pakkanen A, Pezzati P, Popa R, Sárkány E, Siest JP, Suvagandha D, Thelen M, Ullhagen J, Vitkus D, Körmöczi GF. External quality assessment providers' services appear to more impact the immunohaematology performance of laboratories than national regulatory and economic conditions. Clin Chem Lab Med. 2022 Jan 19;60(3):361-369. doi: 10.1515/cclm-2021-1219. PMID: 35041777.
(In)direct chloride ISE measurements, room for improvementKootstra-Ros JE, van der Hagen EAE, van Schrojenstein Lantman M, Thelen M, van Berkel M; SKML General Clinical Chemistry Group. (In)direct chloride ISE measurements, room for improvement. Clin Chem Lab Med. 2022 May 5;60(7):e168-e171. doi: 10.1515/cclm-2022-0220. PMID: 35512217.
Results from a proficiency testing pilot for immunosuppressant microsampling assaysVeenhof H, Koster RA, Junier LAT, Zweipfenning P, Touw DJ. Results from a proficiency testing pilot for immunosuppressant microsampling assays. Ther Drug Monit. 2022 Aug 24. doi: 10.1097/FTD.0000000000001019. Epub ahead of print. PMID: 35971674.
2021
External quality assessment of M-protein diagnostics: a realistic
impression of the accuracy and precision of M-protein quantificationde Kat Angelino CM, Jacobs JFM. External quality assessment of M-protein diagnostics: a realistic impression of the accuracy and precision of M-protein quantification. Clin Chem Lab Med. 2021 Jan 28;59(6):1063-1068. doi: 10.1515/cclm-2020-1810. PMID: 33544500.
Malaria diagnosis in a malaria non-endemic high-resource country: high variation of diagnostic strategy in clinical laboratories in the NetherlandsBoonstra MB, Koelewijn R, Brienen EAT, Silvis W, Stelma FF, Mank TG, Mulder B, van Lieshout L, van Hellemond JJ. Malaria diagnosis in a malaria non-endemic high-resource country: high variation of diagnostic strategy in clinical laboratories in the Netherlands. Malar J. 2021 Oct 19;20(1):411. doi: 10.1186/s12936-021-03889-7. PMID: 34666766.
Harmonization status of procalcitonin measurements: what do comparison studies and EQA schemes tell us?Huynh HH, Bœuf A, Pfannkuche J, Schuetz P, Thelen M, Nordin G, van der Hagen E, Kaiser P, Kesseler D, Badrick T, Poggi B, Tiikkainen U, Davies GJ, Kessler A, Plebani M, Vinh J, Delatour V; The IFCC WG-PCT members. Harmonization status of procalcitonin measurements: what do comparison studies and EQA schemes tell us? Clin Chem Lab Med. 2021 Jun 21. doi: 10.1515/cclm-2021-0566. Epub ahead of print. PMID: 34147043.
Quality Control of Busulfan Plasma Quantitation, Modeling and Dosing: An Interlaboratory Proficiency Testing ProgramMcCune JS, Punt AM, Yeh RF, Dupuis R Ph LL,
Kweekel DM, Franssen Pharm D EJF, Ritchie JC, van Maarseveen E, Pharm D
AH. Quality Control of Busulfan Plasma Quantitation, Modeling and
Dosing: An Interlaboratory Proficiency Testing Program. Ther Drug Monit.
2021 Mar 2. doi: 10.1097/FTD.0000000000000862. Epub ahead of print.
PMID: 33675302.
2020
Big data and reference intervals: rationale, current practices, harmonization and standardization prerequisites and future perspectives of indirect determination of reference intervals using routine dataMartinez-Sanchez L, Marques-Garcia F, Ozarda Y, Blanco A, Brouwer N, Canalias F, Cobbaert C, Thelen M, den Elzen W. Big data and reference intervals: rationale, current practices, harmonization and standardization prerequisites and future perspectives of indirect determination of reference intervals using routine data. Adv Lab Med. 2020 Aug 8;2(1):9-25. doi: 10.1515/almed-2020-0034. PMID: 37359198; PMCID: PMC10197285.
External quality assessment schemes for inorganic elements in the clinical laboratory: Lessons from the OELM schemeArnaud J, Patriarca M, Fofou-Caillierez BM, González-Estecha M, Gómez MG, De Graaf I, Patriarca V, Ropert-Bouchet M, Schröer-Janssen L, Siebelder C, Te Winkel M, Ventura Alemany M, Weykamp C. External quality assessment schemes for inorganic elements in the clinical laboratory: Lessons from the OELM scheme. J Trace Elem Med Biol. 2020 May;59:126414. doi: 10.1016/j.jtemb.2019.126414. Epub 2019 Oct 11. PMID: 31810809.
Feasibility for aggregation of commutable external quality assessment results to evaluate metrological traceability and agreement among resultsvan der Hagen EAE, Weykamp C, Sandberg S, Stavelin AV, MacKenzie F, Miller WG. Feasibility for aggregation of commutable external quality assessment results to evaluate metrological traceability and agreement among results. Clin Chem Lab Med. 2020 Aug 6;59(1):117-125. doi: 10.1515/cclm-2020-0736. PMID: 32759402.
Current state of the morphological assessment of urinary erythrocytes in The Netherlands: a nation-wide questionnaireLuimstra JJ, Koçer RG, Jerman A, Klein Gunnewiek J, Gijzen K, Jacobs LHJ, Demir AY. Current state of the morphological assessment of urinary erythrocytes in The Netherlands: a nation-wide questionnaire. Clin Chem Lab Med. 2020 Oct 25;58(11):1891-1900. doi: 10.1515/cclm-2020-0236. PMID: 32335538.
Optimizing hepcidin measurement with a proficiency test framework and standardization improvementAune ET, Diepeveen LE, Laarakkers CM, Klaver S, Armitage AE, Bansal S, Chen M, Fillet M, Han H, Herkert M, Itkonen O, van de Kerkhof D, Krygier A, Lefebvre T, Neyer P, Rieke M, Tomosugi N, Weykamp CW, Swinkels DW. Optimizing hepcidin measurement with a proficiency test framework and standardization improvement. Clin Chem Lab Med. 2020 Oct 1;59(2):315-323. doi: 10.1515/cclm-2020-0928. PMID: 33001847.
First international external quality assessment scheme of nucleic acid amplification tests for the detection of Schistosoma and soil-transmitted helminths, including StrongyloidesCools P, van Lieshout L, Koelewijn R, Addiss
D, Ajjampur SSR, Ayana M, Bradbury RS, Cantera JL, Dana D, Fischer K,
Imtiaz R, Kabagenyi J, Lok J, McCarthy J, Mejia R, Mekonnen Z, Njenga
SM, Othman N, Shao H, Traub R, Van Esbroeck M, Vercruysse J, Vlaminck J,
Williams SA, Verweij JJ, van Hellemond JJ, Levecke B. First
international external quality assessment scheme of nucleic acid
amplification tests for the detection of Schistosoma and
soil-transmitted helminths, including Strongyloides: A pilot study. PLoS
Negl Trop Dis. 2020 Jun 16;14(6):e0008231. doi:
10.1371/journal.pntd.0008231. PMID: 32544158; PMCID: PMC7319349.
Implementing Dried Blood Spot sampling in transplant patient careImplementing Dried Blood Spot sampling in transplant patient care. Proefschrift. KKGT-sectielid Herman Veenhof, 24 februari 2020.
Hoe meten weten wordt - inaugurele rede door prof. dr. Marc ThelenRede uitgesproken bij de aanvaarding van het ambt van bijzonder hoogleraar Kwaliteit in de medische laboratoriumzorg aan de Radboud Universiteit/het Radbudumc op vrijdag 31 januari 2020 - door prof. dr. Marc H.M. Thelen
2019
Broad Bands Observed in Serum Electrophoresis Should Not Be Taken LightlyBosman MCJ, Schreurs RHP, Nieuwenhuizen L,
Bakkeren DL, Jacobs JFM. Broad Bands Observed in Serum Electrophoresis
Should Not Be Taken Lightly. Clin Chem. 2019 May;65(5):618-621. doi: 10.1373/clinchem.2018.297176. PMID: 31036618.
Harmonization of Busulfan Plasma Exposure Unit (BPEU): A Community-Initiated Consensus StatementMcCune JS, Quinones CM, Ritchie J, Carpenter PA, van Maarseveen E, Yeh RF, Anasetti C, Boelens JJ, Hamerschlak N, Hassan M, Kang HJ, Kanda Y, Paci A, Perales MA, Shaw PJ, Seewaldt VL, Savani BN, Hsieh A, Poon B, Mohty M, Pulsipher MA, Pasquini M, Dupuis LL. Harmonization of Busulfan Plasma Exposure Unit (BPEU): A Community-Initiated Consensus Statement. Biol Blood Marrow Transplant. 2019 Sep;25(9):1890-1897. doi: 10.1016/j.bbmt.2019.05.021. Epub 2019 May 25. PMID: 31136799; PMCID: PMC6755045.
Fast 0/1-h algorithm for detection of NSTEMI: are current high-sensitivity cardiac troponin assays fit for purpose? An EQA-based evaluationvan der Hagen EAE, Cobbaert CM, Meijer R,
Thelen MHM. Fast 0/1-h algorithm for detection of NSTEMI: are current
high-sensitivity cardiac troponin assays fit for purpose? An EQA-based
evaluation. Clin Chem Lab Med. 2019 Nov 26;57(12):1999-2007. doi:
10.1515/cclm-2019-0253. PMID: 31326959.
Commutability of proficiency testing material containing amitriptyline and nortriptyline: A study within the framework of the Dutch Calibration 2.000 projectRobijns K, Boone NW, Jansen RTP, Kuypers AWHM, Neef C, Touw DJ. Commutability of proficiency testing material containing amitriptyline and nortriptyline: A study within the framework of the Dutch Calibration 2.000 project. Clin Chim Acta. 2019 Nov;498:6-10. doi: 10.1016/j.cca.2019.07.036. Epub 2019 Jul 30. PMID: 31374190.
2018
Analytical validation of the Hevylite assays for M-protein quantificationJacobs JFM, Haagen IA, Lodder A, van der Kroft C, de Kat Angelino CM, Croockewit S, Nieuwenhuys E, Gelderman KA. Analytical validation of the Hevylite assays for M-protein quantification. Clin Chem Lab Med. 2018 Jun 27;56(7):1169-1175. doi: 10.1515/cclm-2017-0817. PMID: 29397379.
Harmonization of PCR-based detection of intestinal pathogens:
experiences from the Dutch external quality assessment scheme on
molecular diagnosis of protozoa in stool samplesSchuurs TA, Koelewijn R, Brienen EAT,
Kortbeek T, Mank TG, Mulder B, Stelma FF, van Lieshout L, van Hellemond
JJ. Harmonization of PCR-based detection of intestinal pathogens:
experiences from the Dutch external quality assessment scheme on
molecular diagnosis of protozoa in stool samples. Clin Chem Lab Med.
2018 Sep 25;56(10):1722-1727. doi: 10.1515/cclm-2017-1057. PMID:
29451859.
IFCC Working Group Recommendations for Assessing
Commutability Part 3: Using the Calibration Effectiveness of a Reference
MaterialBudd JR, Weykamp C, Rej R, MacKenzie F,
Ceriotti F, Greenberg N, Camara JE, Schimmel H, Vesper HW, Keller T,
Delatour V, Panteghini M, Burns C, Miller WG; IFCC Working Group on
Commutability. IFCC Working Group Recommendations for Assessing
Commutability Part 3: Using the Calibration Effectiveness of a Reference
Material. Clin Chem. 2018 Mar;64(3):465-474. doi:
10.1373/clinchem.2017.277558. Epub 2018 Jan 18. PMID: 29348164.
Interference of glucose and total protein on Jaffe based creatinine
methods: mind the covolume - replyden Elzen WPJ, Cobbaert CM, Weykamp C.
Interference of glucose and total protein on Jaffe based creatinine
methods: mind the covolume - reply. Clin Chem Lab Med. 2018 Jul
26;56(8):e190. doi: 10.1515/cclm-2018-0269. PMID: 29688885.
NUMBER: standardized reference
intervals in the Netherlands using a 'big data' approachden Elzen WPJ, Brouwer N, Thelen MH, Le
Cessie S, Haagen IA, Cobbaert CM. NUMBER: standardized reference
intervals in the Netherlands using a 'big data' approach. Clin Chem Lab
Med. 2018 Dec 19;57(1):42-56. doi: 10.1515/cclm-2018-0462. PMID:
30218599.
The quest for equivalence of test results: the pilgrimage of the Dutch
Calibration 2.000 program for metrological traceabilityJansen RTP, Cobbaert CM, Weykamp C, Thelen M.
The quest for equivalence of test results: the pilgrimage of the Dutch
Calibration 2.000 program for metrological traceability. Clin Chem Lab
Med. 2018 Sep 25;56(10):1673-1684. doi: 10.1515/cclm-2017-0796. PMID:
29341939.
2017
Between-laboratory analysis of IgG antibodies against Aspergillus fumigatus in paired quality control samplesToorenenbergen AWV, Kurstjens JJM.
Between-laboratory analysis of IgG antibodies against Aspergillus
fumigatus in paired quality control samples. Clin Chem Lab Med. 2017 Aug
28;55(10):e233-e235. doi: 10.1515/cclm-2016-1053. PMID: 28375842.
Analytical performance
specifications for external quality assessment - definitions and
descriptionsJones GRD, Albarede S, Kesseler D, MacKenzie
F, Mammen J, Pedersen M, Stavelin A, Thelen M, Thomas A, Twomey PJ,
Ventura E, Panteghini M; EFLM Task Finish Group – Analytical Performance
Specifications for EQAS (TFG-APSEQA). Analytical performance
specifications for external quality assessment - definitions and
descriptions. Clin Chem Lab Med. 2017 Jun 27;55(7):949-955. doi:
10.1515/cclm-2017-0151. PMID: 28593915.
Post-standardization of routine creatinine assays: are
they suitable for clinical applicationsJassam N, Weykamp C, Thomas A, Secchiero S,
Sciacovelli L, Plebani M, Thelen M, Cobbaert C, Perich C, Ricós C, Paula
FA, Barth JH. Post-standardization of routine creatinine assays: are
they suitable for clinical applications. Ann Clin Biochem. 2017
May;54(3):386-394. doi: 10.1177/0004563216664541. Epub 2016 Aug 5. PMID:
27496794.
IFCC
approved HPLC reference measurement procedure for the alcohol
consumption biomarker carbohydrate-deficient transferrin (CDT): Its
validation and useSchellenberg F, Wielders J, Anton R, Bianchi
V, Deenmamode J, Weykamp C, Whitfield J, Jeppsson JO, Helander A. IFCC
approved HPLC reference measurement procedure for the alcohol
consumption biomarker carbohydrate-deficient transferrin (CDT): Its
validation and use. Clin Chim Acta. 2017 Feb;465:91-100. doi:
10.1016/j.cca.2016.12.022. Epub 2016 Dec 23. PMID: 28025028.
Analytical performance of 17 general chemistry analytes across countries
and across manufacturers in the INPUtS project of EQA organizers in
Italy, the Netherlands, Portugal, United Kingdom and SpainWeykamp C, Secchiero S, Plebani M, Thelen M,
Cobbaert C, Thomas A, Jassam N, Barth JH, Perich C, Ricós C, Faria AP.
Analytical performance of 17 general chemistry analytes across countries
and across manufacturers in the INPUtS project of EQA organizers in
Italy, the Netherlands, Portugal, United Kingdom and Spain. Clin Chem
Lab Med. 2017 Feb 1;55(2):203-211. doi: 10.1515/cclm-2016-0220. PMID:
27447239.
Time for a holistic approach and
standardization education in laboratory medicineCobbaert C. Time for a holistic approach and
standardization education in laboratory medicine. Clin Chem Lab Med.
2017 Mar 1;55(3):311-313. doi: 10.1515/cclm-2016-0952. PMID: 27930364.
Expressing analytical performance from
multi-sample evaluation in laboratory EQAThelen MHM, Jansen RTP, Weykamp CW, Steigstra
H, Meijer R, Cobbaert CM. Expressing analytical performance from
multi-sample evaluation in laboratory EQA. Clin Chem Lab Med. 2017 Aug
28;55(10):1509-1516. doi: 10.1515/cclm-2016-0970. PMID: 28182577.
Fibrinogen determination according to Clauss: commutability assessment of International and commercial standards and quality control samplesvan den Besselaar AMHP, van Rijn CJJ,
Cobbaert CM, Reijnierse GLA, Hollestelle MJ, Niessen RWLM, Hudig F.
Fibrinogen determination according to Clauss: commutability assessment
of International and commercial standards and quality control samples.
Clin Chem Lab Med. 2017 Oct 26;55(11):1761-1769. doi:
10.1515/cclm-2016-1088. PMID: 28412717.
Diagnostic
performance of serological assays for anti-HBs testing: Results from a
quality assessment programRaven S, Hautvast J, Steenbergen JV,
Akkermans R, Weykamp C, Smits F, Hoebe C, Vossen A. Diagnostic
performance of serological assays for anti-HBs testing: Results from a
quality assessment program. J Clin Virol. 2017 Feb;87:17-22. doi:
10.1016/j.jcv.2016.12.002. Epub 2016 Dec 7. PMID: 27987422.
2016
Standardisation and
use of the alcohol biomarker carbohydrate-deficient transferrin (CDT)Helander A, Wielders J, Anton R, Arndt T,
Bianchi V, Deenmamode J, Jeppsson JO, Whitfield JB, Weykamp C,
Schellenberg F; International Federation of Clinical Chemistry and
Laboratory Medicine Working Group on Standardisation of
Carbohydrate-Deficient Transferrin (IFCC WG-CDT). Standardisation and
use of the alcohol biomarker carbohydrate-deficient transferrin (CDT).
Clin Chim Acta. 2016 Aug 1;459:19-24. doi: 10.1016/j.cca.2016.05.016.
Epub 2016 May 21. PMID: 27221205.
A
multicenter comparison of whole blood vitamin B6 assaysvan Zelst BD, de Beer RJ, Neele M, Kos S,
Kema IP, Tegelaers FP, Cobbaert CM, Weykamp CW, de Jonge R. A
multicenter comparison of whole blood vitamin B6 assays. Clin Chem Lab
Med. 2016 Apr;54(4):609-16. doi: 10.1515/cclm-2015-0385. PMID: 26457777.
2015
Creatinine,
Jaffe, and glucose: another inconvenient truthWeykamp C, Kuypers A, Bakkeren D, Franck P,
Loon Dv, Gunnewiek JK, Jonge Rd, Steigstra H, Cobbaert C. Creatinine,
Jaffe, and glucose: another inconvenient truth. Clin Chem Lab Med. 2015
Nov;53(12):e347-9. doi: 10.1515/cclm-2015-0258. PMID: 25996486.
A Multilaboratory Commutability Evaluation of
Proficiency Testing Material for Carbamazepine and Valproic Acid: A
Study Within the Framework of the Dutch Calibration 2000 ProjectRobijns K, Boone NW, Kuypers AW, Jansen RT,
Neef C, Touw DJ. A Multilaboratory Commutability Evaluation of
Proficiency Testing Material for Carbamazepine and Valproic Acid: A
Study Within the Framework of the Dutch Calibration 2000 Project. Ther
Drug Monit. 2015 Aug;37(4):445-50. doi: 10.1097/FTD.0000000000000164.
PMID: 25525758.
Defining analytical performance specifications: Consensus Statement
from the 1st Strategic Conference of the European Federation of Clinical
Chemistry and Laboratory MedicineSandberg S, Fraser CG, Horvath AR, Jansen R,
Jones G, Oosterhuis W, Petersen PH, Schimmel H, Sikaris K, Panteghini M.
Defining analytical performance specifications: Consensus Statement
from the 1st Strategic Conference of the European Federation of Clinical
Chemistry and Laboratory Medicine. Clin Chem Lab Med. 2015
May;53(6):833-5. doi: 10.1515/cclm-2015-0067. PMID: 25719329.
2014
External quality
assurance programs as a tool for verifying standardization of
measurement procedures: Pilot collaboration in EuropePerich C, Ricós C, Alvarez V, Biosca C, Boned
B, Cava F, Doménech MV, Fernández-Calle P, Fernández-Fernández P,
García-Lario JV, Minchinela J, Simón M, Jansen R. External quality
assurance programs as a tool for verifying standardization of
measurement procedures: Pilot collaboration in Europe. Clin Chim Acta.
2014 May 15;432:82-9. doi: 10.1016/j.cca.2013.11.005. Epub 2013 Nov 28.
PMID: 24291706.
A category 1 EQA scheme for comparison of laboratory
performance and method performance: An international pilot study in the
framework of the Calibration 2000 projectJansen R, Jassam N, Thomas A, Perich C,
Fernandez-Calle P, Faria AP, Correia H, Barth JH, Weykamp C, Cobbaert C,
Thelen M, Ricós C. A category 1 EQA scheme for comparison of laboratory
performance and method performance: An international pilot study in the
framework of the Calibration 2000 project. Clin Chim Acta. 2014 May
15;432:90-8. doi: 10.1016/j.cca.2013.11.003. Epub 2013 Nov 14. PMID:
24240021.
2013
Can current analytical quality performance of UK clinical
laboratories support evidence-based guidelines for diabetes and
ischaemic heart disease?--A pilot study and a proposalJassam N, Yundt-Pacheco J, Jansen R, Thomas
A, Barth JH. Can current analytical quality performance of UK clinical
laboratories support evidence-based guidelines for diabetes and
ischaemic heart disease?--A pilot study and a proposal. Clin Chem Lab
Med. 2013 Aug;51(8):1579-84. doi: 10.1515/cclm-2012-0840. PMID:
23525878.
Defining acceptable limits for
the metrological traceability of specific measurandsBais R, Armbruster D, Jansen RT, Klee G,
Panteghini M, Passarelli J, Sikaris KA; IFCC Working Group on Allowable
Error for Traceable Results (WG-AETR). Defining acceptable limits for
the metrological traceability of specific measurands. Clin Chem Lab Med.
2013 May;51(5):973-9. doi: 10.1515/cclm-2013-0122. PMID: 23525873.
2012
Alphafetoprotein in the Dutch External Quality Assurance programme: a need for improvementHouwert AC, Lock MT, Lentjes EG. Alphafetoprotein in the Dutch External Quality Assurance programme: a need for improvement. Ann Clin Biochem. 2012 May;49(Pt 3):273-6. doi: 10.1258/acb.2011.011046. Epub 2012 Mar 27. PMID: 22454543.
Between-laboratory
quality control of automated analysis of IgG antibodies against
Aspergillus fumigatusvan Toorenenbergen AW. Between-laboratory
quality control of automated analysis of IgG antibodies against
Aspergillus fumigatus. Diagn Microbiol Infect Dis. 2012
Nov;74(3):278-81. doi: 10.1016/j.diagmicrobio.2012.07.002. Epub 2012 Aug
25. PMID: 22925654.
Systematic monitoring of standardization and harmonization status with
commutable EQA-samples--five year experience from the NetherlandsCobbaert C, Weykamp C, Franck P, de Jonge R,
Kuypers A, Steigstra H, Klein Gunnewiek J, van Loon D, Jansen R.
Systematic monitoring of standardization and harmonization status with
commutable EQA-samples--five year experience from the Netherlands. Clin
Chim Acta. 2012 Dec 24;414:234-40. doi: 10.1016/j.cca.2012.09.027. Epub
2012 Oct 2. PMID: 23041212.
Second round robin for plasma
hepcidin methods: first steps toward harmonizationKroot JJ, van Herwaarden AE, Tjalsma H,
Jansen RT, Hendriks JC, Swinkels DW. Second round robin for plasma
hepcidin methods: first steps toward harmonization. Am J Hematol. 2012
Oct;87(10):977-83. doi: 10.1002/ajh.23289. Epub 2012 Aug 7. PMID:
22886770.
2011
SKML congres: Kwaliteit in HarmonisatieDemacker PNM. SKML congres: Kwaliteit in Harmonisatie. Ned Tijdschr Klin Chem Labgeneesk 2011; 36: 219-223
Proficiency testing/external quality assessment: current challenges and future directionsMiller WG, Jones GR, Horowitz GL, Weykamp C. Proficiency testing/external quality assessment: current challenges and future directions. Clin Chem. 2011 Dec;57(12):1670-80. doi: 10.1373/clinchem.2011.168641. Epub 2011 Sep 30. PMID: 21965556.
Harmonization and external quality assessment of antithrombin activity assaysvan den Besselaar AM, Haas FJ, Kuypers AW. Harmonization and external quality assessment of antithrombin activity assays. Thromb Res. 2012 Feb;129(2):187-91. doi: 10.1016/j.thromres.2011.06.007. Epub 2011 Jul 8. PMID: 21741074.
Focusing on the clinical impact of standardization of creatinine
measurements: a report by the EFCC Working Group on Creatinine
StandardizationDelanghe JR, Cobbaert C, Harmoinen A, Jansen R, Laitinen P, Panteghini M. Focusing on the clinical impact of standardization of creatinine measurements: a report by the EFCC Working Group on Creatinine Standardization. Clin Chem Lab Med. 2011 Jun;49(6):977-82. doi: 10.1515/CCLM.2011.167. Epub 2011 Mar 24. PMID: 21428858.
Collective opinion paper on findings of the 2010 convocation of experts on laboratory qualityCooper G, DeJonge N, Ehrmeyer S, Yundt-Pacheco J, Jansen R, Ricós C, Plebani M. Collective opinion paper on findings of the 2010 convocation of experts on laboratory quality. Clin Chem Lab Med. 2011 May;49(5):793-802. doi: 10.1515/CCLM.2011.149. Epub 2011 Mar 3. PMID: 21366504.
2010
hCG-bepalingen in de Nederlandse externe kwaliteitsbewakingLentjes EGWM, Thomas CMG. hCG-bepalingen in de Nederlandse externe kwaliteitsbewaking. Ned. Tijdschr. Klin. Chem. Labgeneesk. 2010; 35: 14-18
Jansen RTP, Slingerland RJ. SKML-Qualtiy Mark for point-of-care test (POCT) glucose meters and glucose meters for home-use. Clin. Chem. Lab. Med. 2010; 48(7): 1021-1027
2009
De Wit NCJ, Baadenhuijsen H, Weykamp CW, Van 't Sant P. Geen goede commuteerbaarheid voor de ASAT-bepaling van monsters in de SKML-enquête Combi Algemene chemie. Ned. Tijdschr. Klin. Chem. Labgeneesk. 2009; 34: 162-164
Harmonization of fibrinogen assay results: study within the framework of the Dutch project ‘Calibration 2000’Van den Besselaar AMHP, Haas FJLM, Van der Graaf F, Kuypers AWHM. Harmonization of fibrinogen assay results: study within the framework of the Dutch project ‘Calibration 2000’. Int. Jnl. Lab. Hem. 2009; 31: 513-520
2008
Arndt T, Van der Meijden B, Wielders J. Atypical serum transferrin isoform distribution in liver cirrhosis studied by HPLC, capillary electrophoresis and transferrin genotyping. Clin. Chem. Acta 394 (2008) 42-46
Wielders J, Bergkamp F, Janssen M, Pekelharing J, Van Pelt J, Punt J. Geschiktheid van CDT analysemethoden t.b.v. onderzoek naar chronisch overmatig alcoholgebruik. Richtlijn van de Nederlandse Vereniging voor Klinische Chemie 5 november 2008
Statistiek en scoresysteem SKML-rondzendingenSteigstra H, Cobbaert C and Baadenhuijsen H. Statistiek en scoresysteem SKML-rondzendingen. Ned. Tijdschr. Klin. Chem. Labgeneesk. 2008; 33: 98-104
Baadenhuijsen H, Weykamp C, Kuypers A, Franck P, Jansen R and Cobbaert C. Commuteerbaarheid van het huidige monstermateriaal in de SKML-rondzendingen van de algemene klinische chemie. Ned. Tijdschr. Klin. Chem. Labgeneesk. 2008; 33: 154-157
Cobbaert C, Weykamp CW, Michielsen ECHJ, Baadenhuijsen H and van Dieijen-Visser MP. Time-dependent instability of cardiac troponins in Human Plasma spiked with NIST Reference Material 2921. Clin. Chem. 2008; 54: 2078-9
Delanghe JR, Cobbaert C, Galteau MM, Harmoinen A, Jansen R, Kruse R, Laitinen P, Thienpont LM, Wuyts B, Weykamp C, Panteghini M. Trueness verification of actual creatinine assays in the European market demonstrates a disappointing variability that needs substantial improvement. An international study in the framework of the EC4 creatinine standardization working group. Clin. Chem. Lab. Med. 2008; 46(9): 1319-1325
Van den Besselaar AMHP, Haas FJLM, Van der Graaf F, Kuypers AWHM. Harmonization of fibrinogen assay results: study within the framework of the Dutch project ‘Calibration 2000’. Int. Jnl. Lab. Hem. 2008; doi:10.1111/j.1751-553X.2008.01070.x
2007
Cobbaert C, Michielsen E, Weykamp CW, Baadenhuijsen H and Van Dieijen-Visser. Do NIST SRM 2921 and recombinant cTnI-based serum pools have potential to harmonize cTnI results? Ned. Tijdschr. Klin. Chem. Labgeneesk. 2007; 32: 175-178
Jansen RTP, Baadenhuijsen H and Willems J. External Quality Assessment in the Netherlands: past, present and future. On the way to trueness assessment. Clinical chemistry behind the Dykes 2007; ISBN-nr: 978-90-76014-16-6
Jansen RTP. EC4: Clinical laboratory globalisation; the EU directives. Ned. Tijdschr. Chem. Labgeneesk. 2007; 32:186-188
Orlando C, Verderio P, Maatman R, Danneberg J, Ramsden S, Neumaier M, Tarascio D, Falbo V, Jansen R, Casini-Raggi C, Malentacchi F, Marubini E, Pizzamiglio S, Vernelen K, Libeer JC, Palicka V, Pazzagli M. EQUAL-qual: A European Program for External Quality Assessment of Genomic DNA Extraction and PCR Amplification. Clinical Chemistry 2007; 53:7 1343-1348
2006
Jansen R, Schumann G, Baadenhuijsen H, Franck P, Franzini C, Kruse R, Kuypers A, Weykamp C, Panteghini M. Trueness verification and traceability assessment of results from commercial systems for measurement of six enzyme activities in serum. An international study in the EC4 framework of the Calibration 2000 project. Clinica Chimica Acta 368 (2006) 160-167
Baadenhuijsen H, Cobbaert CM, Jansen RTP. Kalibratie 2000 en de weerbarstige praktijk aan de hand van de LD-bepaling. Ned. Tijdschr. Klin. Chem. Labgeneesk. 2006; 31:178-179
Van den Besselaar AMHP, Haas FJLM, Kuypers AWHM. Harmonisation of factor VIII:C assay results: study within the framework of the Dutch project ‘Calibration 2000’. Br J Haematol 2006; 132:75-9
2005
Jansen RTP. Kalibratie 2000: de stand van zaken, de relatie met de IVD-richtlijn, de toekomst. Ned. Tijdschr. Klin. Chem. Labgeneesk. 2005; 30: 49-55
Baadenhuijsen H, Kuypers A, Weykamp C, Cobbaert C, Jansen R. External Quality Assessment in The Netherlands: time to introduce commutable survey specimens. Lessons from the Dutch "Calibration 2000" project. Clin. Chem. Lab. Med. 2005: 43(3): 304-307
Jansen RTP. Bias and imprecision in the analytical process-reaching desirable standards of performance. 16th IFCC-FESCC European Congress of Clinical Biochemistry and Laboratory Medicine - EUROMEDLAB 2005. Clinica Chimica Acta, International Journal of Clinical Chemistry and Applied Molecular Biology 2005; 355: S30
Harmonisation of factor VIII:C assay results: study within the framework of the Dutch project ‘Calibration 2000’Van den Besselaar AMHP, Haas FJLM, Kuypers AWHM. Harmonisation of factor VIII:C assay results: study within the framework of the Dutch project ‘Calibration 2000’. 2005 Blackwell Publishing Ltd, Br J Haem; 132: 75-79
2004
Baadenhuijsen H, Kuypers AWHM, Weykamp CW, Cobbaert CM, Jansen RTP. Het belang van commuteerbare referentiematerialen en externe SKML-monsters bij enzymstandaardisatie. Studie in het kader van het SKML-project "Kalibratie 2000". Ned. Tijdschr. Klin. Chem. Labgeneesk. 2004, vol. 29 no. 5
2003
Cobbaert C, Baadenhuijsen H, Weykamp CW, Jansen R. The Importance of Commutable Secundary Reference Materials. Clin. Chem. Lab. Med. 2003; 41(10): Special supplementA69 (Abstract)
Gratama JW, Kraan J, Keeney M, Sutherland DR, Granger V, Barnett D. Validation of the single-platform ISHAGE method for CD34+ hematopoietic stem and progenitor cell enumeration in an international multicenter study. Cytotherapy 2003; 5: 55-65
Levering WHBM, Wind H, Sintnicolaas K, Hooijkaas H, Gratama JW. Flow cytometric HLA-B27 screening: cross-reactivity patterns of commercially available anti-HLA-B27 monoclonal antibodies with other HLA-B antigens. Cytometry (Clinical Cytometry) 2003; 54B: 28-38
Levering WHBM, Wind H, Hooijkaas H, Sintnicolaas K, Brando B, Gratama JW. Flow cytometric screening for HLA-B27 on peripheral blood lymphocytes. Journal of Biological Regulators and Homeostatic Agents 2003; 17: 241-246
2002
Baadenhuijsen H, Steigstra H, Cobbaert C, Kuypers A, Weykamp C, Jansen R. Commutability Assessment of Potential Reference Materials Using a Multicenter Split-Patient-Sample Between-Field-Methods (Twin-Study) Design: Study within the Framework of the Dutch Project "Calibration 2000". Clinical Chemistry; 48:9: 1520-1525 (2002)
Cobbaert C, Weykamp C, Baadenhuijsen H, Kuypers A, Lindemans J, Jansen R. Selection, Preparation, and Characterization of Commutable Frozen Human Serum Pools as Potential Secondary Reference Materials for Lipid and Apolipoprotein Measuerments: Study within the Framework of the Dutch Project "Calibration 2000". Clinical Chemistry; 48:9: 1526-1538 (2002)
Gratama JW, Kraan J, Keeney M, Granger V, Barnett D. Reduction of variation in T-cell subset enumeration between 55 laboratories using single-platform, 3- or 4-color flow cytometry based on CD45 & SSC based gating of lymphocytes. Cytometry (Clinical Cytometry) 2002; 50: 92-101
2001
Kuypers A, Baadenhuijsen H, Jansen R. Calibration 2000: EQAS produced commutable secondary calibrators for your laboratory. Clin. Chem. Lab. Med. 2001; 39 Special Supplement pp S1-S448, S68 (Abstract)
Keijzer MH de, Baadenhuijsen H, Jansen RTP. Reactie op "Aanbevelingen van de enzymcommissie NVKC". Ned. Tijdschr. Klin. Chem. 2001; 26: 258 (Letter)
Knubben MJM, Jansen RTP. Het nut van het gebruik van onafhankelijke bloedmonsters bij de kwaliteitsbewaking van bloedgasanalyse. Ned. Tijdschr. Klin. Chem. 2001; 26: 186-189
Klasen IS, Kuypers A, Weykamp C, Lentjes E, Jol-van der Zijde, Backer E, Baadenhuijsen H. Calibration 2000: results of a twin study for ten serum proteins. Ned. Tijdschr. Klin. Chem. 2001; 26: 68
Besselaar AMHP van den, Haas FJLM, Heij-Koene AJM van der. Kalibratie 2000: een tweelingstudie van kandidaat kalibratoren voor bepaling van fibrinogeen, factor VIII en antitrombine. Ned. Tijdschr. Klin. Chem. 2001; 26: 110
Kluin-Nelemans JC, Van Wering ER, Van der Schoot CE, Adriaansen HJ, Van 't Veer MB, Van Dongen JJM, Gratama JW on behalf of the Dutch Cooperative Study Group on Immunophenotyping of Haematological Malignancies (SIHON). SIHONSCORE: a scoring system for external quality control of leukaemia/lymphoma immunophenotyping measuring all analytic phases of laboratory performance. BR. J. Haematol. 2001; 112: 337-343
Metz M de, Berg GA van den, Duijnhoven JLP van, Berends F, Verhoef NJ, Kuijpers AWHM. Calibration 2000 project. Hemocytometry. Ned. Tijdschr. Klin. Chem. 2001; 26: 78
2000
Baadenhuijsen H, Scholten R, Willems HL, Weykamp CW, Jansen RTP. A model for harmonization of routine clinical chemistry results between clinical laboratories. Ann. Clin. Biochem. 2000; 37, 330-337
Baadenhuijsen H, Franck PHF, Kuypers A, Weykamp C, Jansen RTP. Enzymstandaardisatie door kalibratie; een uitgebreide pilot. Ned. Tijdschr. Klin. Chem. 2000; vol. 25, no. 2 (Abstract)
Jansen RTP. The quest for comparability: Calibration 2000. Accreditation and Quality Assurance 2000; 5; 363-366
Jansen RTP, Kuypers AWHM, Baadenhuijsen H, Besselaar AMHP van den, Cobbaert CM, Gratama JW, Klasen IS, Lentjes EGWM, Metz M de, Preijers FWMB, Ross HA, Steigstra H, Weykamp CW. Kalibratie 2000. Ned. Tijdschr. Klin. Chem. 2000; vol. 25, 153-158
Haas FJLM, Besselaar AMHP van den, Heij-Koene AJM van der, Reijnierse GLA. Kalibratie 2000. Ned. Tijdschr. Klin. Chem. 2000; 25: 299-300
Levering WHBM, Van den Beemd R, Te Marvelde JG, Van Beers WAM, Hooijkaas H, Sintnicolaas K, Gratama JW. External quality assessment of flow cytometric HLA-B27 typing. Cytometry (Communications in Clinical Cytometry) 2000; 42: 95-105
