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Items: 1 to 50 of 151

1.

Seasonal Changes in Serum Thyrotropin Concentrations Observed from Big Data Obtained During Six Consecutive Years from 2010 to 2015 at a Single Hospital in Japan.

Yoshihara A, Noh JY, Watanabe N, Iwaku K, Kunii Y, Ohye H, Suzuki M, Matsumoto M, Suzuki N, Sugino K, Thienpont LM, Hishinuma A, Ito K.

Thyroid. 2018 Apr;28(4):429-436. doi: 10.1089/thy.2017.0600. Epub 2018 Apr 2.

PMID:
29608438
2.

Standardization of Free Thyroxine Measurements Allows the Adoption of a More Uniform Reference Interval.

De Grande LAC, Van Uytfanghe K, Reynders D, Das B, Faix JD, MacKenzie F, Decallonne B, Hishinuma A, Lapauw B, Taelman P, Van Crombrugge P, Van den Bruel A, Velkeniers B, Williams P, Thienpont LM; IFCC Committee for Standardization of Thyroid Function Tests (C-STFT).

Clin Chem. 2017 Oct;63(10):1642-1652. doi: 10.1373/clinchem.2017.274407. Epub 2017 Jul 18.

3.

Value Assignment of Vitamin D Metabolites in Vitamin D Standardization Program Serum Samples.

Phinney KW, Camara JE, Tai SS, Sander LC, Wise SA, De Grande LAC, Thienpont LM, Possolo AM, Toman B, Sempos CT, Betz JM, Coates PM.

J AOAC Int. 2017 Sep 1;100(5):1253-1259. doi: 10.5740/jaoacint.17-0204. Epub 2017 Jun 16.

4.

Harmonization of Serum Thyroid-Stimulating Hormone Measurements Paves the Way for the Adoption of a More Uniform Reference Interval.

Thienpont LM, Van Uytfanghe K, De Grande LAC, Reynders D, Das B, Faix JD, MacKenzie F, Decallonne B, Hishinuma A, Lapauw B, Taelman P, Van Crombrugge P, Van den Bruel A, Velkeniers B, Williams P; IFCC Committee for Standardization of Thyroid Function Tests (C-STFT).

Clin Chem. 2017 Jul;63(7):1248-1260. doi: 10.1373/clinchem.2016.269456. Epub 2017 May 18.

5.

Using "big data" to describe the effect of seasonal variation in thyroid-stimulating hormone.

De Grande LA, Goossens K, Van Uytfanghe K, Halsall I, Yoshimura Noh J, Hens K, Thienpont LM.

Clin Chem Lab Med. 2017 Feb 1;55(2):e34-e36. doi: 10.1515/cclm-2016-0500. No abstract available.

PMID:
27447241
6.

Monitoring the stability of the standardization status of FT4 and TSH assays by use of daily outpatient medians and flagging frequencies.

De Grande LAC, Goossens K, Van Uytfanghe K, Das B, MacKenzie F, Patru MM, Thienpont LM; IFCC Committee for Standardization of Thyroid Function Tests (C-STFT).

Clin Chim Acta. 2017 Apr;467:8-14. doi: 10.1016/j.cca.2016.04.032. Epub 2016 Apr 27.

PMID:
27132242
7.

Standardization of FT4 and Harmonization of TSH Measurements--A Request for Input from Endocrinologists and Other Physicians.

Thienpont LM, Faix JD, Beastall G.

Endocr Pract. 2016 Mar;22(3):374. doi: 10.4158/1934-2403-22.3.374. No abstract available.

PMID:
26937820
8.

Standardization of Free T4 and Harmonization of TSH Measurements: A Request for Input from Endocrinologists and Other Physicians.

Thienpont LM, Faix JD, Beastall G.

Eur Thyroid J. 2015 Dec;4(4):271-2. doi: 10.1159/000440614. Epub 2015 Oct 6. No abstract available.

9.

Standardization of FT4 and harmonization of TSH measurements: a request for input from endocrinologists and other physicians.

Thienpont LM, Faix JD, Beastall G.

Endocrine. 2015 Dec;50(3):826-7. doi: 10.1007/s12020-015-0752-1. Epub 2015 Oct 1. No abstract available.

PMID:
26429779
10.

Standardization of Free Thyroxine and Harmonization of Thyrotropin Measurements: A Request for Input from Endocrinologists and Other Physicians.

Thienpont LM, Faix JD, Beastall G.

Thyroid. 2015 Dec;25(12):1379-80. doi: 10.1089/thy.2015.0309. Epub 2015 Oct 14. No abstract available.

11.

Standardization of FT4 and Harmonization of TSH Measurements--A Request for Input from Endocrinologists and Other Physicians.

Thienpont LM, Faix JD, Beastall G.

Exp Clin Endocrinol Diabetes. 2016 Jan;124(1):61-2. doi: 10.1055/s-0035-1564102. Epub 2015 Sep 15. No abstract available.

PMID:
26372848
12.

Standardization of FT4 and harmonization of TSH measurements - a request for input from endocrinologists and other physicians.

Thienpont LM, Faix JD, Beastall G.

Endocr J. 2015;62(10):855-6. doi: 10.1507/endocrj.EJ15-0382. Epub 2015 Jul 22.

13.

Standardization of FT4 and harmonization of TSH measurements - a request for input from endocrinologists and other physicians.

Thienpont LM, Faix JD, Beastall G.

Clin Endocrinol (Oxf). 2016 Feb;84(2):305-306. doi: 10.1111/cen.12861. Epub 2015 Aug 12. No abstract available.

PMID:
26201824
14.

A Fresh Look at the Relationship between TSH and Free Thyroxine in Cross-Sectional Data.

De Grande LA, Van Uytfanghe K, Thienpont LM.

Eur Thyroid J. 2015 Mar;4(1):69-70. doi: 10.1159/000369796. Epub 2015 Feb 14. No abstract available.

15.

On-line flagging monitoring - a new quality management tool for the analytical phase.

Goossens K, Brinkmann T, Thienpont LM.

Clin Chem Lab Med. 2015 Sep 1;53(10):e269-70. doi: 10.1515/cclm-2015-0066. No abstract available.

PMID:
25898395
16.

Monitoring laboratory data across manufacturers and laboratories--A prerequisite to make "Big Data" work.

Goossens K, Van Uytfanghe K, Twomey PJ, Thienpont LM; Participating Laboratories.

Clin Chim Acta. 2015 May 20;445:12-8. doi: 10.1016/j.cca.2015.03.003. Epub 2015 Mar 12.

PMID:
25771106
17.

The Empower project - a new way of assessing and monitoring test comparability and stability.

De Grande LA, Goossens K, Van Uytfanghe K, Stöckl D, Thienpont LM.

Clin Chem Lab Med. 2015 Jul;53(8):1197-204. doi: 10.1515/cclm-2014-0959.

PMID:
25720076
18.

Trueness and comparability assessment of widely used assays for 5 common enzymes and 3 electrolytes.

Goossens K, Van Uytfanghe K, Thienpont LM.

Clin Chim Acta. 2015 Mar 10;442:44-5. doi: 10.1016/j.cca.2015.01.009. Epub 2015 Jan 15. No abstract available.

PMID:
25598408
19.

Reference measurement procedure corrected all method trimmed mean - The best of two worlds.

Goossens K, Thienpont LM.

Clin Chim Acta. 2015 Feb 2;440:55-6. doi: 10.1016/j.cca.2014.11.008. Epub 2014 Nov 13. No abstract available.

PMID:
25447697
20.

Calculation of non-commutability budgets by t-testing.

Goossens K, Van Uytfanghe K, Thienpont LM.

Clin Chim Acta. 2015 Jan 1;438:212-3. doi: 10.1016/j.cca.2014.08.035. Epub 2014 Sep 6. No abstract available.

PMID:
25199850
21.

A Progress Report of the IFCC Committee for Standardization of Thyroid Function Tests.

Thienpont LM, Van Uytfanghe K, Van Houcke S, Das B, Faix JD, MacKenzie F, Quinn FA, Rottmann M, Van den Bruel A; IFCC Committee for Standardization of Thyroid Function Tests (C-STFT).

Eur Thyroid J. 2014 Jun;3(2):109-16. doi: 10.1159/000358270. Epub 2014 May 7.

22.

Verification of reference intervals by the C28 protocol--the alpha error/power trade-off.

Goossens K, De Grande LA, Keller T, Weber S, Thienpont LM.

Clin Chim Acta. 2014 Sep 25;436:18-9. doi: 10.1016/j.cca.2014.04.032. Epub 2014 May 9. No abstract available.

PMID:
24814577
23.

Measurements for 8 common analytes in native sera identify inadequate standardization among 6 routine laboratory assays.

Stepman HC, Tiikkainen U, Stöckl D, Vesper HW, Edwards SH, Laitinen H, Pelanti J, Thienpont LM; Participating Laboratories.

Clin Chem. 2014 Jun;60(6):855-63. doi: 10.1373/clinchem.2013.220376. Epub 2014 Mar 31.

24.

A statistical basis for harmonization of thyroid stimulating hormone immunoassays using a robust factor analysis model.

Stöckl D, Van Uytfanghe K, Van Aelst S, Thienpont LM.

Clin Chem Lab Med. 2014 Jul;52(7):965-72. doi: 10.1515/cclm-2013-1038.

PMID:
24566365
25.

High variability in serum estradiol measurements in men and women.

Vesper HW, Botelho JC, Vidal ML, Rahmani Y, Thienpont LM, Caudill SP.

Steroids. 2014 Apr;82:7-13. doi: 10.1016/j.steroids.2013.12.005. Epub 2014 Jan 6.

26.

A "Step-Up" approach for harmonization.

Van Uytfanghe K, De Grande LA, Thienpont LM.

Clin Chim Acta. 2014 May 15;432:62-7. doi: 10.1016/j.cca.2013.12.015. Epub 2013 Dec 18.

PMID:
24362230
27.

Determination of free thyroid hormones.

Thienpont LM, Van Uytfanghe K, Poppe K, Velkeniers B.

Best Pract Res Clin Endocrinol Metab. 2013 Oct;27(5):689-700. doi: 10.1016/j.beem.2013.05.012. Epub 2013 Jun 25. Review.

PMID:
24094639
28.

In Reply.

Vesper HW, Botelho JC, Tai SS, Van Uytfanghe K, Thienpont LM.

Clin Chem. 2013 Jul;59(7):1130-1. No abstract available.

29.

[The ways of harmonization of clinical laboratory measurement techniques].

Miller WG, Myers GL, Gantzer ML, Kahn SE, Schönbrunner ER, Thienpont LM, Bunk DM, Christenson RH, Eckfeldt JH, Stanley GL, Nubling CM, Sturgeon CM.

Klin Lab Diagn. 2013 Feb;(2):54-61. Russian.

PMID:
23808013
30.

A fresh look at analytical performance specifications from biological variation.

Stepman HC, Stöckl D, Twomey PJ, Thienpont LM.

Clin Chim Acta. 2013 Jun 5;421:191-2. doi: 10.1016/j.cca.2013.03.018. Epub 2013 Mar 26. No abstract available.

PMID:
23537736
31.

Standardize the serum albumin assay now: calibrate it to 60% of the serum total protein assay.

Stepman HC, Stöckl D, De Grande LA, Thienpont LM.

Clin Chem Lab Med. 2013 Jul;51(7):e151-2. doi: 10.1515/cclm-2012-0890. No abstract available.

PMID:
23370911
32.

Long-term stability of laboratory tests and practical implications for quality management.

Van Houcke SK, Stepman HC, Thienpont LM, Fiers T, Stove V, Couck P, Anckaert E, Gorus F.

Clin Chem Lab Med. 2013 Jun;51(6):1227-31. doi: 10.1515/cclm-2012-0820.

PMID:
23337057
33.

Isotope-dilution liquid chromatography-tandem mass spectrometry candidate reference method for total testosterone in human serum.

Botelho JC, Shacklady C, Cooper HC, Tai SS, Van Uytfanghe K, Thienpont LM, Vesper HW.

Clin Chem. 2013 Feb;59(2):372-80. doi: 10.1373/clinchem.2012.190934. Epub 2012 Dec 4.

34.

Harmonization of immunoassays to the all-procedure trimmed mean - proof of concept by use of data from the insulin standardization project.

Van Houcke SK, Van Aelst S, Van Uytfanghe K, Thienpont LM.

Clin Chem Lab Med. 2013 May;51(5):e103-5. doi: 10.1515/cclm-2012-0661. No abstract available.

PMID:
23152424
35.

"Good samples make good assays" – the problem of sourcing clinical samples for a standardization project.

Van Houcke SK, Thienpont LM.

Clin Chem Lab Med. 2013 May;51(5):967-72.

PMID:
23045383
36.

Calcium, magnesium, albumin, and total protein measurement in serum as assessed with 20 fresh-frozen single-donation sera.

Van Houcke SK, Rustad P, Stepman HC, Kristensen GB, Stöckl D, Røraas TH, Sandberg S, Thienpont LM.

Clin Chem. 2012 Nov;58(11):1597-9. doi: 10.1373/clinchem.2012.189670. Epub 2012 Sep 5. No abstract available.

37.

Vitamin D status as an international issue: national surveys and the problem of standardization.

Sempos CT, Vesper HW, Phinney KW, Thienpont LM, Coates PM; Vitamin D Standardization Program (VDSP).

Scand J Clin Lab Invest Suppl. 2012;243:32-40. doi: 10.3109/00365513.2012.681935.

PMID:
22536760
38.

Statistical power for commutability testing in the presence of random, sample-related effects by use of the EP14 protocol.

Røraas TH, Van Houcke SK, Stöckl D, Thienpont LM.

Clin Chim Acta. 2012 Oct 9;413(19-20):1710-1. doi: 10.1016/j.cca.2012.05.002. Epub 2012 May 10. No abstract available.

PMID:
22579766
39.

Standardization of measurements of 25-hydroxyvitamin D3 and D2.

Thienpont LM, Stepman HC, Vesper HW.

Scand J Clin Lab Invest Suppl. 2012;243:41-9. doi: 10.3109/00365513.2012.681950.

40.

Long-term stability of clinical laboratory data: sodium as benchmark.

Stepman HC, Stöckl D, Stove V, Fiers T, Couck P, Gorus F, Thienpont LM.

Clin Chem. 2011 Nov;57(11):1616-7. doi: 10.1373/clinchem.2011.168195. Epub 2011 Aug 30. No abstract available.

41.

Status of serum-calcium and -albumin measurement in Argentina assessed in 300 representative laboratories with 20 fresh frozen single donation sera.

Stepman HC, Stöckl D, Acheme R, Sesini S, Mazziotta D, Thienpont LM.

Clin Chem Lab Med. 2011 Nov;49(11):1829-36. doi: 10.1515/CCLM.2011.681. Epub 2011 Aug 30.

PMID:
21875398
42.

Roadmap for harmonization of clinical laboratory measurement procedures.

Greg Miller W, Myers GL, Lou Gantzer M, Kahn SE, Schönbrunner ER, Thienpont LM, Bunk DM, Christenson RH, Eckfeldt JH, Lo SF, Nübling CM, Sturgeon CM.

Clin Chem. 2011 Aug;57(8):1108-17. doi: 10.1373/clinchem.2011.164012. Epub 2011 Jun 15.

43.

IFCC international conventional reference procedure for the measurement of free thyroxine in serum: International Federation of Clinical Chemistry and Laboratory Medicine (IFCC) Working Group for Standardization of Thyroid Function Tests (WG-STFT)(1).

International Federation of Clinical Chemistry; Laboratory Medicine Working Group for Standardization of Thyroid Function Tests, Van Houcke SK, Van Uytfanghe K, Shimizu E, Tani W, Umemoto M, Thienpont LM.

Clin Chem Lab Med. 2011 Aug;49(8):1275-81. doi: 10.1515/CCLM.2011.639. Epub 2011 Jun 16.

PMID:
21675941
44.

Candidate reference measurement procedures for serum 25-hydroxyvitamin D3 and 25-hydroxyvitamin D2 by using isotope-dilution liquid chromatography-tandem mass spectrometry.

Stepman HC, Vanderroost A, Van Uytfanghe K, Thienpont LM.

Clin Chem. 2011 Mar;57(3):441-8. doi: 10.1373/clinchem.2010.152553. Epub 2011 Jan 19.

45.

Full-scan mass spectral evidence for 3-epi-25-hydroxyvitamin D₃ in serum of infants and adults.

Stepman HC, Vanderroost A, Stöckl D, Thienpont LM.

Clin Chem Lab Med. 2011 Feb;49(2):253-6. doi: 10.1515/CCLM.2011.050. Epub 2010 Dec 14.

PMID:
21143012
46.

Standardization activities in the field of thyroid function tests: a status report.

Thienpont LM, Van Uytfanghe K, Van Houcke S; IFCC Working Group for Standardization of Thyroid Function Tests (WG-STFT).

Clin Chem Lab Med. 2010 Nov;48(11):1577-83. doi: 10.1515/CCLM.2010.321. Epub 2010 Oct 29.

PMID:
21034252
47.

WITHDRAWN: Reply to the letter of Soldin et al.

Anckaert E, Poppe K, Van Uytfanghe K, Schiettecatte J, Foulon W, Thienpont LM.

Clin Chim Acta. 2010 Oct 1. [Epub ahead of print]

48.

Traceability to a common standard for protein measurements by immunoassay for in-vitro diagnostic purposes.

Thienpont LM, Van Houcke SK.

Clin Chim Acta. 2010 Dec 14;411(23-24):2058-61. doi: 10.1016/j.cca.2010.09.001. Epub 2010 Sep 7.

PMID:
20831866
49.

FT4 immunoassays may display a pattern during pregnancy similar to the equilibrium dialysis ID-LC/tandem MS candidate reference measurement procedure in spite of susceptibility towards binding protein alterations.

Anckaert E, Poppe K, Van Uytfanghe K, Schiettecatte J, Foulon W, Thienpont LM.

Clin Chim Acta. 2010 Sep 6;411(17-18):1348-53. doi: 10.1016/j.cca.2010.05.032. Epub 2010 May 25.

PMID:
20510682
50.

Importance of sample-related effects for commutability testing according to the EP14 protocol.

Stöckl D, Stepman HC, Van Houcke SK, Thienpont LM.

Clin Chim Acta. 2010 Sep 6;411(17-18):1378-9. doi: 10.1016/j.cca.2010.04.024. Epub 2010 Apr 29. No abstract available.

PMID:
20434438

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