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Vitamin D: marker, measurand & measurement.
Dirks NF, Cavalier E, Heijboer AC. Dirks NF, et al. Among authors: heijboer ac. Endocr Connect. 2023 Mar 15;12(4):e220269. doi: 10.1530/EC-22-0269. Print 2023 Apr 1. Endocr Connect. 2023. PMID: 36688810 Free PMC article. Review.
Pre-analytical stability of FGF23 with the contemporary immunoassays.
Dirks NF, Smith ER, van Schoor NM, Vervloet MG, Ackermans MT, de Jonge R, Heijboer AC. Dirks NF, et al. Among authors: heijboer ac. Clin Chim Acta. 2019 Jun;493:104-106. doi: 10.1016/j.cca.2019.02.032. Epub 2019 Mar 1. Clin Chim Acta. 2019. PMID: 30826370
The Effect of Vitamin D Supplementation on its Metabolism and the Vitamin D Metabolite Ratio.
Francic V, Ursem SR, Dirks NF, Keppel MH, Theiler-Schwetz V, Trummer C, Pandis M, Borzan V, Grübler MR, Verheyen ND, März W, Tomaschitz A, Pilz S, Heijboer AC, Obermayer-Pietsch B. Francic V, et al. Among authors: heijboer ac. Nutrients. 2019 Oct 21;11(10):2539. doi: 10.3390/nu11102539. Nutrients. 2019. PMID: 31640241 Free PMC article. Clinical Trial.
Harmonization of commercial assays for PINP; the way forward.
Vasikaran SD, Bhattoa HP, Eastell R, Heijboer AC, Jørgensen NR, Makris K, Ulmer C, Kanis JA, Cooper C, Silverman S, Cavalier E. Vasikaran SD, et al. Among authors: heijboer ac. Osteoporos Int. 2020 Mar;31(3):409-412. doi: 10.1007/s00198-020-05310-6. Epub 2020 Jan 23. Osteoporos Int. 2020. PMID: 31975180 Free PMC article.
European Biological Variation Study (EuBIVAS): within- and between-subject biological variation estimates of β-isomerized C-terminal telopeptide of type I collagen (β-CTX), N-terminal propeptide of type I collagen (PINP), osteocalcin, intact fibroblast growth factor 23 and uncarboxylated-unphosphorylated matrix-Gla protein-a cooperation between the EFLM Working Group on Biological Variation and the International Osteoporosis Foundation-International Federation of Clinical Chemistry Committee on Bone Metabolism.
Cavalier E, Lukas P, Bottani M, Aarsand AK, Ceriotti F, Coşkun A, Díaz-Garzón J, Fernàndez-Calle P, Guerra E, Locatelli M, Sandberg S, Carobene A; European Federation of Clinical Chemistry and Laboratory Medicine Working Group on Biological Variation and IOF-IFCC Committee on Bone Metabolism. Cavalier E, et al. Osteoporos Int. 2020 Aug;31(8):1461-1470. doi: 10.1007/s00198-020-05362-8. Epub 2020 Apr 8. Osteoporos Int. 2020. PMID: 32270253
228 results