TY - GEN AU - David L. Duewer AU - Sam A. Margolis AU - Katherine E. Sharpless AU - Jeanice B. Thomas C2 - , National Institute of Standards and Technology, Gaithersburg, MD DA - 2013-07-01 04:07:00 DO - https://doi.org/10.6028/NIST.IR.7880-23 LA - en PB - , National Institute of Standards and Technology, Gaithersburg, MD PY - 2013 TI - NIST micronutrients measurement quality assurance program winter 2001 comparability studies : results for round robin XLIX fat-soluble vitamins and carotenoids in human serum and round robin 14 ascorbic acid in human serum: ER -