How accurate are assays for 25-hydroxyvitamin D? Data from the international vitamin D external quality assessment scheme.

References 1. Thiede C, Florek M, Bornhauser M, Ritter M, Mohr B, Brendel C, et al. Rapid quantification of mixed chimerism using multiplex amplification of short tandem repeat markers and fluorescence detection. Bone Marrow Transplant 1999;23:1055–60. 2. Lawler M, Humphries P, McCann SR. Evaluation of mixed chimerism by in vitro amplification of dinucleotide repeat sequences using the polymerase chain reaction. Blood 1991;77:2504–14. 3. Scharf SJ, Smith AG, Hansen JA, McFarland C, Erlich HA. Quantitative determination of bone marrow transplant engraftment using fluorescent polymerase chain reaction primers for human identity markers. Blood 1995;85:1954–63. 4. Alizadeh M, Bernard M, Danic B, Dauriac C, Birebent B, Lapart C, et al. Quantitative assessment of hematopoietic chimerism after bone marrow transplantation by real-time quantitative polymerase chain reaction. Blood 2002;99:4618–25. 5. Schraml E, Daxberger H, Watzinger F, Lion T. Quantitative analysis of chimerism after allogeneic stem cell transplantation by PCR amplification of microsatellite markers and capillary electrophoresis with fluorescence detection: the Vienna experience. Leukemia 2003;17:224–7. 6. Koehl U, Beck O, Esser R, Seifried E, Klingebiel T, Schwabe D, et al. Quantitative analysis of chimerism after allogeneic stem cell transplantation by PCR amplification of microsatellite markers and capillary electrophoresis with fluorescence detection: the Frankfurt experience. Leukemia 2003;17:232–6. 7. Van Deerlin VM, Leonard DG. Bone marrow engraftment analysis after allogeneic bone marrow transplantation. Clin Lab Med 2000;20:197–225. 8. Acquaviva C, Duval M, Mirebeau D, Bertin R, Cave H. Quantitative analysis of chimerism after allogeneic stem cell transplantation by PCR amplification of microsatellite markers and capillary electrophoresis with fluorescence detection: the Paris-Robert Debre experience. Leukemia 2003;17:241–6. 9. Chalandon Y, Vischer S, Helg C, Chapuis B, Roosnek E. Quantitative analysis of chimerism after allogeneic stem cell transplantation by PCR amplification of microsatellite markers and capillary electrophoresis with fluorescence detection: the Geneva experience. Leukemia 2003;17:228–31. 10. Kreyenberg H, Holle W, Mohrle S, Niethammer D, Bader P. Quantitative analysis of chimerism after allogeneic stem cell transplantation by PCR amplification of microsatellite markers and capillary electrophoresis with fluorescence detection: the Tuebingen experience. Leukemia 2003;17:237–40. 11. Thiede C, Bornhauser M, Ehninger G. Evaluation of STR informativity for chimerism testing—comparative analysis of 27 STR systems in 203 matched related donor recipient pairs. Leukemia 2004;18:248–54.