National Institute of Standards and Technology SRM 972 as a reference material for serum total 25-hydroxyvitamin D measurements

Faculty of Science, Toho University, Chiba, Japan; Information Center, National Institute of Health and Nutrition, Tokyo, Japan; Faculty of Pharmaceutical Sciences, Hokuriku University, Kanazawa, Japan; Department of Clinical Laboratory and Molecular Pathology, Graduate School of Pharmaceutical Science, University of Toyama, Toyama, Japan; Department of Molecular Diagnosis, Graduate School of Medicine, Chiba University, Chiba, Japan; Graduate School of Human Life Science, Showa Women's University, Tokyo, Japan; Department of Health and Nutrition, University of Human Arts and Sciences, Saitama, Japan; Kanagawa Health Service Association, Kanagawa, Japan; Department of Clinical Nutrition, Faculty of Health Sciences, Suzuka University of Medical Science, Mie, Japan; Mitsubishi Chemical Medience Corporation, Tokyo, Japan; SRL, Inc., Tokyo, Japan; New Tokyo Hospital, Chiba, Japan; Department of Clinical Laboratory Sciences, Nitobe Bunka College, Tokyo Japan; Department of Clinical Chemistry, School of Health Sciences, Fujita Health University, Aichi, Japan; Department of Chemistry, School of Medicine, Fujita Health University, Aichi, Japan; Department of Molecular and Laboratory Medicine, Mie University Graduate School of Medicine, Mie, Japan; Kyowa Medex Co., Ltd., Tokyo, Japan; Department of Laboratory Medicine, Hamamatsu University School of Medicine, Shizuoka, Japan; Ajinomoto Co., Inc. Tokyo, Japan; Beckman Coulter Japan Co., Tokyo, Japan; Department of Hygienic Sciences, Kobe Pharmaceutical University, Kobe, Japan