1. Department of Epidemiology and Biostatistics, School of Public Health; Tianjin Medical University; Tianjin China
2. Department of Medical Epidemiology and Biostatistics; Karolinska Institutet; Stockholm Sweden
3. Department of Psychology; University of Southern California; Los Angeles California
4. Aging Research Center, Department of Neurobiology, Care Sciences and Society; Karolinska Institutet and Stockholm University; Stockholm Sweden
5. Department of Radiology; Tianjin Gongan Hospital; Tianjin China