@misc{1134926, author = {Mary Bedner and Katrice A Lippa and Susan S-C Tai and Carolyn Q Burdette}, title = {NISTNIH Vitamin D Metabolites Quality Assurance Program (VitDQAP)::final report}, year = {2020}, month = {2020-09-01 04:09:00}, publisher = {, National Institute of Standards and Technology, Gaithersburg, MD}, doi = {https://doi.org/10.6028/NIST.IR.8293}, language = {en}, }