TY - GEN AU - Mary Bedner C2 - , National Institute of Standards and Technology, Gaithersburg, MD DA - 2016-09-01 04:09:00 DO - https://doi.org/10.6028/NIST.IR.8142 LA - en PB - , National Institute of Standards and Technology, Gaithersburg, MD PY - 2016 TI - NIST/NIH Vitamin D Metabolites Quality Assurance Program Report of Participant Results: Winter 2015 Comparability Study(Exercise 10): ER -