%0 Journal Article %A Brian F. Mandell %T How well do we understand calcium and vitamin D? %D 2018 %R 10.3949/ccjm.85b.07018 %J Cleveland Clinic Journal of Medicine %P 505-506 %V 85 %N 7 %U https://www.ccjm.org/content/ccjom/85/7/505.full.pdf