Vitamin D and Cognitive Impairment in the Elderly U.S. Population

Langa, Kenneth M; Llewellyn, David J; Lang, Iain A; Melzer, David. (2011). Vitamin D and Cognitive Impairment in the Elderly U.S. Population. The Journals of Gerontology Series A: Biological Sciences and Medical Sciences. 66A(1), 59-65.