Association of Vitamin D Levels with Risk of Cognitive Impairment and Dementia: A Systematic Review and Meta-Analysis of Prospective Studies. Zhang X-X, Wang H-R, Hu Y-Z, Sun H-M, Feng Y-X, Jia J-J J Alzheimers Dis. 2024; 98(2):373-385. PMID: 38461506. Abstract Comment Bookmark Recommend Follow Comment | Bookmark | Recommend | Follow