Circulatory Levels of Toxic Metals (Aluminum, Cadmium, Mercury, Lead) in Patients with Alzheimer's Disease: A Quantitative Meta-Analysis and Systematic Review. Xu L, Zhang W, Liu X, Zhang C, Wang P, Zhao X J Alzheimers Dis. 2018; 62(1):361-372. PMID: 29439342. Abstract Comment Bookmark Recommend Follow Comment | Bookmark | Recommend | Follow