TY - GEN AU - Bedner, Mary AU - Lippa, Katrice AU - Tai, Susan C2 - NIST Interagency/Internal Report (NISTIR), National Institute of Standards and Technology, Gaithersburg, MD DA - 2013-08-24 04:08:00 LA - en PB - NIST Interagency/Internal Report (NISTIR), National Institute of Standards and Technology, Gaithersburg, MD PY - 2013 TI - Results from the NIST/NIH Vitamin D Metabolites Quality Assurance Program: Five Years of Comparability Studies ER -