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Items: 1 to 50 of 92

1.

Performance of laboratory tests used to measure blood phenylalanine for the monitoring of patients with Phenylketonuria.

Moat SJ, Schulenburg-Brand D, Lemonde H, Bonham JR, Weykamp CW, Mei JV, Shortland GS, Carling RS.

J Inherit Metab Dis. 2019 Aug 21. doi: 10.1002/jimd.12163. [Epub ahead of print] Review.

PMID:
31433494
2.

Provisional standardization of hepcidin assays: creating a traceability chain with a primary reference material, candidate reference method and a commutable secondary reference material.

Diepeveen LE, Laarakkers CMM, Martos G, Pawlak ME, Uğuz FF, Verberne KESA, van Swelm RPL, Klaver S, de Haan AFJ, Pitts KR, Bansal SS, Abbas IM, Fillet M, Lefebvre T, Geurts-Moespot AJ, Girelli D, Castagna A, Herkert M, Itkonen O, Olbina G, Tomosugi N, Westerman ME, Delatour V, Weykamp CW, Swinkels DW.

Clin Chem Lab Med. 2019 May 27;57(6):864-872. doi: 10.1515/cclm-2018-0783.

PMID:
30485171
3.

The global impact of the International Federation of Clinical Chemistry and Laboratory Medicine, Education and Management Division: engaging stakeholders and assessing HbA1c quality in a multicentre study across China.

English E, Weykamp C, Ji L, Siebelder C, Shan Z, Wang Y, Li H, Garry John W.

Clin Chem Lab Med. 2018 Dec 19;57(2):288-295. doi: 10.1515/cclm-2018-0434.

4.

Interference of glucose and total protein on Jaffe based creatinine methods: mind the covolume - reply.

den Elzen WPJ, Cobbaert CM, Weykamp C.

Clin Chem Lab Med. 2018 Jul 26;56(8):e190. doi: 10.1515/cclm-2018-0269. No abstract available.

PMID:
29688885
5.

Clinically relevant discrepancies between different rheumatoid factor assays.

Falkenburg WJJ, von Richthofen HJ, Koers J, Weykamp C, Schreurs MWJ, Bakker-Jonges LE, Haagen IA, Lems WF, Hamann D, van Schaardenburg D, Rispens T.

Clin Chem Lab Med. 2018 Sep 25;56(10):1749-1758. doi: 10.1515/cclm-2017-0988. No abstract available.

6.

Glucose and total protein: unacceptable interference on Jaffe creatinine assays in patients.

den Elzen WPJ, Cobbaert CM, Klein Gunnewiek JMT, Bakkeren DL, van Berkel M, Frasa MAM, Herpers RLJM, Kuypers AWHM, Ramakers C, Roelofsen-de Beer RJAC, van der Vuurst H, Weykamp C.

Clin Chem Lab Med. 2018 Jul 26;56(8):e185-e187. doi: 10.1515/cclm-2017-1170. No abstract available.

PMID:
29397380
7.

IFCC Working Group Recommendations for Assessing Commutability Part 2: Using the Difference in Bias between a Reference Material and Clinical Samples.

Nilsson G, Budd JR, Greenberg N, Delatour V, Rej R, Panteghini M, Ceriotti F, Schimmel H, Weykamp C, Keller T, Camara JE, Burns C, Vesper HW, MacKenzie F, Miller WG; IFCC Working Group on Commutability.

Clin Chem. 2018 Mar;64(3):455-464. doi: 10.1373/clinchem.2017.277541. Epub 2018 Jan 18.

8.

IFCC Working Group Recommendations for Assessing Commutability Part 3: Using the Calibration Effectiveness of a Reference Material.

Budd 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.

Clin Chem. 2018 Mar;64(3):465-474. doi: 10.1373/clinchem.2017.277558. Epub 2018 Jan 18.

9.

IFCC Working Group Recommendations for Assessing Commutability Part 1: General Experimental Design.

Miller WG, Schimmel H, Rej R, Greenberg N, Ceriotti F, Burns C, Budd JR, Weykamp C, Delatour V, Nilsson G, MacKenzie F, Panteghini M, Keller T, Camara JE, Zegers I, Vesper HW; IFCC Working Group on Commutability.

Clin Chem. 2018 Mar;64(3):447-454. doi: 10.1373/clinchem.2017.277525. Epub 2018 Jan 18.

10.

The quest for equivalence of test results: the pilgrimage of the Dutch Calibration 2.000 program for metrological traceability.

Jansen RTP, Cobbaert CM, Weykamp C, Thelen M.

Clin Chem Lab Med. 2018 Sep 25;56(10):1673-1684. doi: 10.1515/cclm-2017-0796. Review. No abstract available.

11.

Evaluation of Performance of Laboratories and Manufacturers Within the Framework of the IFCC model for Quality Targets of HbA1c.

Weykamp C, Siebelder C.

J Diabetes Sci Technol. 2018 Jul;12(4):747-752. doi: 10.1177/1932296817741320. Epub 2017 Nov 17. Review.

12.

Reprint of 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).

Clin Chim Acta. 2017 Apr;467:15-20. doi: 10.1016/j.cca.2017.03.018. Epub 2017 Mar 18. Review.

PMID:
28322729
13.

Expressing analytical performance from multi-sample evaluation in laboratory EQA.

Thelen MHM, Jansen RTP, Weykamp CW, Steigstra H, Meijer R, Cobbaert CM.

Clin Chem Lab Med. 2017 Aug 28;55(10):1509-1516. doi: 10.1515/cclm-2016-0970.

PMID:
28182577
14.

IFCC approved HPLC reference measurement procedure for the alcohol consumption biomarker carbohydrate-deficient transferrin (CDT): Its validation and use.

Schellenberg F, Wielders J, Anton R, Bianchi V, Deenmamode J, Weykamp C, Whitfield J, Jeppsson JO, Helander A.

Clin Chim Acta. 2017 Feb;465:91-100. doi: 10.1016/j.cca.2016.12.022. Epub 2016 Dec 23.

PMID:
28025028
15.

Diagnostic performance of serological assays for anti-HBs testing: Results from a quality assessment program.

Raven S, Hautvast J, Steenbergen JV, Akkermans R, Weykamp C, Smits F, Hoebe C, Vossen A.

J Clin Virol. 2017 Feb;87:17-22. doi: 10.1016/j.jcv.2016.12.002. Epub 2016 Dec 7.

PMID:
27987422
16.

Post-standardization of routine creatinine assays: are they suitable for clinical applications.

Jassam N, Weykamp C, Thomas A, Secchiero S, Sciacovelli L, Plebani M, Thelen M, Cobbaert C, Perich C, Ricós C, Paula FA, Barth JH.

Ann Clin Biochem. 2017 May;54(3):386-394. doi: 10.1177/0004563216664541. Epub 2016 Aug 5.

PMID:
27496794
17.

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.

Weykamp C, Secchiero S, Plebani M, Thelen M, Cobbaert C, Thomas A, Jassam N, Barth JH, Perich C, Ricós C, Faria AP.

Clin Chem Lab Med. 2017 Feb 1;55(2):203-211. doi: 10.1515/cclm-2016-0220.

18.

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).

Clin Chim Acta. 2016 Aug 1;459:19-24. doi: 10.1016/j.cca.2016.05.016. Epub 2016 May 21. Review.

PMID:
27221205
19.

Toward Worldwide Hepcidin Assay Harmonization: Identification of a Commutable Secondary Reference Material.

van der Vorm LN, Hendriks JC, Laarakkers CM, Klaver S, Armitage AE, Bamberg A, Geurts-Moespot AJ, Girelli D, Herkert M, Itkonen O, Konrad RJ, Tomosugi N, Westerman M, Bansal SS, Campostrini N, Drakesmith H, Fillet M, Olbina G, Pasricha SR, Pitts KR, Sloan JH, Tagliaro F, Weykamp CW, Swinkels DW.

Clin Chem. 2016 Jul;62(7):993-1001. doi: 10.1373/clinchem.2016.256768. Epub 2016 May 12.

20.

HbA1c: EQA in Germany, Belgium and the Netherlands using fresh whole blood samples with target values assigned with the IFCC reference system.

Kaiser P, Spannagl M, van Campenhout C, Lenga Y, Siebelder C, Weykamp C.

Clin Chem Lab Med. 2016 Nov 1;54(11):1769-1775. doi: 10.1515/cclm-2016-0123.

PMID:
27171390
21.

Effects of hemoglobin C, D, E and S traits on measurements of hemoglobin A1c by twelve methods.

Rohlfing C, Hanson S, Weykamp C, Siebelder C, Higgins T, Molinaro R, Yip PM, Little RR.

Clin Chim Acta. 2016 Apr 1;455:80-3. doi: 10.1016/j.cca.2016.01.031. Epub 2016 Jan 29.

22.

Performance of glycated hemoglobin (HbA(1c)) methods evaluated with EQAS studies using fresh blood samples: Still space for improvements.

Mosca A, Paleari R, Carobene A, Weykamp C, Ceriotti F.

Clin Chim Acta. 2015 Dec 7;451(Pt B):305-9. doi: 10.1016/j.cca.2015.10.014. Epub 2015 Oct 22.

PMID:
26483128
23.

A multicenter comparison of whole blood vitamin B6 assays.

van Zelst BD, de Beer RJ, Neele M, Kos S, Kema IP, Tegelaers FP, Cobbaert CM, Weykamp CW, de Jonge R.

Clin Chem Lab Med. 2016 Apr;54(4):609-16. doi: 10.1515/cclm-2015-0385.

PMID:
26457777
24.

Two novel haemoglobin variants that affect haemoglobin A1c measurement by ion-exchange chromatography.

Bots M, Stroobants AK, Delzenne B, Soeters MR, de Vries JE, Weykamp CW, Norg RJ, Veldthuis M, Zwieten Rv.

Clin Chem Lab Med. 2015 Aug;53(9):1465-71. doi: 10.1515/cclm-2015-0054.

PMID:
26035110
25.

Creatinine, Jaffe, and glucose: another inconvenient truth.

Weykamp C, Kuypers A, Bakkeren D, Franck P, Loon Dv, Gunnewiek JK, Jonge Rd, Steigstra H, Cobbaert C.

Clin Chem Lab Med. 2015 Nov;53(12):e347-9. doi: 10.1515/cclm-2015-0258. No abstract available.

PMID:
25996486
26.

Investigation of 2 models to set and evaluate quality targets for hb a1c: biological variation and sigma-metrics.

Weykamp C, John G, Gillery P, English E, Ji L, Lenters-Westra E, Little RR, Roglic G, Sacks DB, Takei I; IFCC Task Force on Implementation of HbA1c Standardization.

Clin Chem. 2015 May;61(5):752-9. doi: 10.1373/clinchem.2014.235333. Epub 2015 Mar 3.

27.

Glycation rate of haemoglobins S, C, D, E, J and G, and analytical interference on the measurement of HbA1c with affinity chromatography and capillary electrophoresis.

Weykamp C, Kemna E, Leppink S, Siebelder C.

Clin Chem Lab Med. 2015 Aug;53(9):e207-10. doi: 10.1515/cclm-2014-1134. No abstract available.

PMID:
25719326
28.

Multicentre evaluation of the Premier Hb9210 HbA1c analyser.

John WG, Little R, Sacks DB, Weykamp C, Lenters-Westra E, Hornsby T, Zhao Z, Siebelder C, Tennill A, English E.

Clin Chem Lab Med. 2015 Feb;53(2):319-27. doi: 10.1515/cclm-2014-0589.

29.

Harmonisation of seven common enzyme results through EQA.

Weykamp C, Franck P, Gunnewiek JK, de Jonge R, Kuypers A, van Loon D, Steigstra H, Cobbaert C; General Chemistry Division of the SKML (Foundation for Quality Assessment in Medical Laboratories, The Netherlands).

Clin Chem Lab Med. 2014 Nov;52(11):1549-55. doi: 10.1515/cclm-2014-0458.

PMID:
24887962
30.

Harmonization of measurement results of the alcohol biomarker carbohydrate-deficient transferrin by use of the toolbox of technical procedures of the International Consortium for Harmonization of Clinical Laboratory Results.

Weykamp C, Wielders J, Helander A, Anton RF, Bianchi V, Jeppsson JO, Siebelder C, Whitfield JB, Schellenberg F; IFCC Working Group on Standardization of Carbohydrate-Deficient Transferrin.

Clin Chem. 2014 Jul;60(7):945-53. doi: 10.1373/clinchem.2014.221531. Epub 2014 Apr 1.

31.

Feasibility of an EQAS for HbA1c in Italy using fresh blood samples.

Mosca A, Weykamp C.

Clin Chem Lab Med. 2014 Jul;52(7):e151-3. doi: 10.1515/cclm-2014-0084. No abstract available.

PMID:
24583462
32.

Clinical impact of direct HDLc and LDLc method bias in hypertriglyceridemia. A simulation study of the EAS-EFLM Collaborative Project Group.

Langlois MR, Descamps OS, van der Laarse A, Weykamp C, Baum H, Pulkki K, von Eckardstein A, De Bacquer D, Borén J, Wiklund O, Laitinen P, Oosterhuis WP, Cobbaert C; EAS-EFLM Collaborative Project.

Atherosclerosis. 2014 Mar;233(1):83-90. doi: 10.1016/j.atherosclerosis.2013.12.016. Epub 2014 Jan 4.

PMID:
24529127
33.

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.

Jansen R, Jassam N, Thomas A, Perich C, Fernandez-Calle P, Faria AP, Correia H, Barth JH, Weykamp C, Cobbaert C, Thelen M, Ricós C.

Clin Chim Acta. 2014 May 15;432:90-8. doi: 10.1016/j.cca.2013.11.003. Epub 2013 Nov 14.

PMID:
24240021
34.

HbA1c: a review of analytical and clinical aspects.

Weykamp C.

Ann Lab Med. 2013 Nov;33(6):393-400. doi: 10.3343/alm.2013.33.6.393. Epub 2013 Oct 17. Review.

35.

External Quality Assessment Scheme for reference laboratories - review of 8 years' experience.

Kessler A, Siekmann L, Weykamp C, Geilenkeuser WJ, Dreazen O, Middle J, Schumann G; IFCC Committee on Traceability in Laboratory Medicine (C-TLM).

Clin Chem Lab Med. 2013 May;51(5):997-1005. doi: 10.1515/cclm-2012-0722.

PMID:
23327864
36.

Measurement of Hba(1C) in patients with chronic renal failure.

Little RR, Rohlfing CL, Tennill AL, Hanson SE, Connolly S, Higgins T, Wiedmeyer CE, Weykamp CW, Krause R, Roberts W.

Clin Chim Acta. 2013 Mar 15;418:73-6. doi: 10.1016/j.cca.2012.12.022. Epub 2013 Jan 12.

37.

HbA1c: performance of the Sebia Capillarys 2 Flex Piercing.

Weykamp C, Waenink-Wieggers H, Kemna E, Siebelder C.

Clin Chem Lab Med. 2013 Jun;51(6):e129-31. doi: 10.1515/cclm-2012-0560. No abstract available.

PMID:
23241674
38.

Toward standardization of carbohydrate-deficient transferrin (CDT) measurements: III. Performance of native serum and serum spiked with disialotransferrin proves that harmonization of CDT assays is possible.

Weykamp C, Wielders JP, Helander A, Anton RF, Bianchi V, Jeppsson JO, Siebelder C, Whitfield JB, Schellenberg F; IFCC Working Group on Standardization of Carbohydrate-Deficient Transferrin (WG-CDT).

Clin Chem Lab Med. 2013 May;51(5):991-6. doi: 10.1515/cclm-2012-0767.

PMID:
23241602
39.

Clinical evaluation of analytical variations in serum creatinine measurements: why laboratories should abandon Jaffe techniques.

Drion I, Cobbaert C, Groenier KH, Weykamp C, Bilo HJ, Wetzels JF, Kleefstra N.

BMC Nephrol. 2012 Oct 8;13:133. doi: 10.1186/1471-2369-13-133.

40.

Systematic monitoring of standardization and harmonization status with commutable EQA-samples--five year experience from the Netherlands.

Cobbaert C, Weykamp C, Franck P, de Jonge R, Kuypers A, Steigstra H, Klein Gunnewiek J, van Loon D, Jansen R.

Clin Chim Acta. 2012 Dec 24;414:234-40. doi: 10.1016/j.cca.2012.09.027. Epub 2012 Oct 2.

PMID:
23041212
41.

Effects of hemoglobin D and E on the measurement of HbA1c with the modified Menarini/ARKRAY ADAMS A1c HA-8180V analyser.

Weykamp C, Visser-Dekkers W, Kemna E, Siebelder C.

Clin Chim Acta. 2012 Dec 24;414:44-5. doi: 10.1016/j.cca.2012.07.023. Epub 2012 Aug 7. No abstract available.

PMID:
23010358
42.

Proficiency testing/external quality assessment: current challenges and future directions.

Miller WG, Jones GR, Horowitz GL, Weykamp C.

Clin Chem. 2011 Dec;57(12):1670-80. doi: 10.1373/clinchem.2011.168641. Epub 2011 Sep 30. Review.

43.

The analytical goals for hemoglobin A(1c) measurement in IFCC units and National Glycohemoglobin Standardization Program Units are different.

Weykamp CW, Mosca A, Gillery P, Panteghini M.

Clin Chem. 2011 Aug;57(8):1204-6. doi: 10.1373/clinchem.2011.162719. Epub 2011 May 13. No abstract available.

44.

One in five laboratories using various hemoglobin A1c methods do not meet the criteria for optimal diabetes care management.

Lenters-Westra E, Weykamp C, Schindhelm RK, Siebelder C, Bilo HJ, Slingerland RJ.

Diabetes Technol Ther. 2011 Apr;13(4):429-33. doi: 10.1089/dia.2010.0148. Epub 2011 Feb 28.

PMID:
21355726
45.

Evaluation of the Menarini/ARKRAY ADAMS A1c HA-8180V analyser for HbA1c.

Weykamp C, Lenters-Westra E, van der Vuurst H, Slingerland R, Siebelder C, Visser-Dekkers W.

Clin Chem Lab Med. 2011 Apr;49(4):647-51. doi: 10.1515/CCLM.2011.096. Epub 2011 Feb 17.

PMID:
21323625
46.

Measurements of neonatal bilirubin and albumin concentrations: a need for improvement and quality control.

van Imhoff DE, Dijk PH, Weykamp CW, Cobbaert CM, Hulzebos CV; BARTrial Study Group.

Eur J Pediatr. 2011 Aug;170(8):977-82. doi: 10.1007/s00431-010-1383-4. Epub 2011 Jan 7.

47.

Toward standardization of carbohydrate-deficient transferrin (CDT) measurements: II. Performance of a laboratory network running the HPLC candidate reference measurement procedure and evaluation of a candidate reference material.

Helander A, Wielders JP, Jeppsson JO, Weykamp C, Siebelder C, Anton RF, Schellenberg F, Whitfield JB; IFCC Working Group on Standardization of Carbohydrate-Deficient Transferrin (WG-CDT).

Clin Chem Lab Med. 2010 Nov;48(11):1585-92. doi: 10.1515/CCLM.2010.322. Epub 2010 Oct 29.

PMID:
21034250
48.

Bilirubin standardization in the Netherlands: alignment within and between manufacturers.

Cobbaert C, Weykamp C, Hulzebos CV.

Clin Chem. 2010 May;56(5):872-3. doi: 10.1373/clinchem.2009.142059. Epub 2010 Feb 25. No abstract available.

49.

A review of the challenge in measuring hemoglobin A1c.

Weykamp C, John WG, Mosca A.

J Diabetes Sci Technol. 2009 May 1;3(3):439-45. Review.

50.

Prime time for enzymatic creatinine methods in pediatrics.

Cobbaert CM, Baadenhuijsen H, Weykamp CW.

Clin Chem. 2009 Mar;55(3):549-58. doi: 10.1373/clinchem.2008.116863. Epub 2009 Jan 23.

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