1. From the Department of Epidemiology and Biostatistics (Z.W., J.W., X.Q., W.X.), School of Public Health, Tianjin Medical University, China; Aging Research Center, Department of Neurobiology (J.G., A.D., W.X.), Care Sciences and Society, Karolinska Institutet, Stockholm, Sweden; Rush Alzheimer's Disease Center (K.A., D.A.B.), Rush University Medical Center, Chicago, IL; and Department of Biomedical Engineering (K.A.), Illinois Institute of Technology, Chicago.