TY - GEN AU - Bedner, Mary AU - Tai, Susan S.-C. C2 - , National Institute of Standards and Technology, Gaithersburg, MD DA - 2016-09-01 04:09:00 DO - https://doi.org/10.6028/NIST.IR.8141 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: Summer 2014 Comparability Study(Exercise 9): ER -