1. Department of Epidemiology and Health Statistics; Hunan Provincial Key Laboratory of Clinical Epidemiology, Xiangya School of Public Health, Central South University, Changsha, China
2. Department of Child, Adolescent and Women's Health, School of Public Health, Capital Medical University, Beijing, China
3. Department of Psychology, University of Alabama at Birmingham, Birmingham, Alabama, USA
4. National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha, China