TY - JOUR AU - Mary Bedner AU - Katrice Lippa AU - Susan Tai C2 - Clinica Chimica ACTA DA - 2013-08-12 DO - https://doi.org/10.1016/j.cca.2013.08.012 LA - en M1 - 426 PB - Clinica Chimica ACTA PY - 2013 TI - An Assessment of 25-Hydroxyvitamin D Measurements in Comparability Studies Conducted by the Vitamin D Metabolites Quality Assurance Program ER -