Publicaties

Op deze pagina vindt u de vermelding van publicaties van het jaar 2000 tot heden.

2021

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 intervalsMartinez-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. Advances in Laboratory Medicine / Avances en Medicina de Laboratorio. 2021;2(1): 9-16. https://doi.org/10.1515/almed-2020-0034

External quality assessment schemes for inorganic elements in the clinical laboratoryArnaud 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 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 NetherlandsLuimstra 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.

Cools et al PLOS NTD HEMQAS pilotCools 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)McCune 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 nortriptylineRobijns 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

Schuurs et al 2018 CCLM Harmonization of PCR-based detection of intestinal pathogenSchuurs 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.

Budd Clin Chem 2018 IFCC part 3Budd 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.

Den Elzen Clin Chem Lab Med 2018 Kreatinine 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_cclm-2018-0462den 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.

Harmonisation of PCR-based detection methods for intestinal protozoaSchuurs 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.

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.

170907 Creatinine-Ann Clin Biochem 2016 (3)Jassam 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.

Schellenberg Clin Chim Acta 2016Schellenberg 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.

Weykamp CCLM 2016Weykamp 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.

CCLM-2016-0952_Cobbaert_DEFCobbaert 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.

MUSE 2017 cclm-2016-0970Thelen 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.

anti-HBs_final 1.0.Raven 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

Helander Clin Chim Acta 2016Helander 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.

Clinical Chemistry and Laboratory Medicine (CCLM)] A multicenter comparison of whole blood vitaminB6 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

Clinical Chemistry and Laboratory Medicine (CCLM)] Creatinine, Jaffe, and glucose- anotherinconvenient 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.

Ther Drug MonitRobijns 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.

CCLMSandberg 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

EQA as tool for verifying standardardization measurement proceduresPerich 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.

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

Quality performance as support for evidence-based guidelinesJassam 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 metrological traceability 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

DMB13074van 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 methodsKroot 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-Harmonisatie.pdfDemacker PNM. SKML congres: Kwaliteit in Harmonisatie. Ned Tijdschr Klin Chem Labgeneesk 2011; 36: 219-223

Proficiency Testing / EQA: 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.

Thrombosis Researchvan 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.

Creatinine StandardisationDelanghe 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.

Findings 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

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 resultsVan 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 resultVan 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

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