TY - GEN AU - Mary Bedner AU - Carolyn Q Burdette C2 - , National Institute of Standards and Technology, Gaithersburg, MD DA - 2017-07-01 04:07:00 DO - https://doi.org/10.6028/NIST.IR.8169 LA - en PB - , National Institute of Standards and Technology, Gaithersburg, MD PY - 2017 TI - NISTNIH vitamin D metabolites quality assurance program report of participant results: summer 2016 comparability study (exercise 12): ER -