Note: Lancet may require free registration before providing content: “Effects of vitamin D supplements on bone mineral density: a systematic review and meta-analysis,” by Ian R. Reid, Mark J. Bolland, and Andrew Grey (Vol. 383, No. 9912, Jan. 11, 2014, p. 146-155, doi:10.1016/S0140-6736(13)61647-5).
www.thelancet.com/journals/lancet/article/PIIS0140-6736%2813%2961647-5/abstract
