@article{{MRA}{}, author = {Freeman, J., Sibley, P., Parker, N., Spears, R., Wilson, K., Levy, H.}, title = { Standardization and Certification of the ADVIA Centaur Vitamin D Total Assay}, journal = {Medical Research Archives}, volume = {5}, number = {8}, year = {2017}, url = {https://esmed.org/MRA/mra/article/view/1458} }