1. Department of Epidemiology and Statistics, School of Public Health, Jiangsu Key Laboratory and Translational Medicine for Geriatric Disease, Medical College of Soochow University, Suzhou, China.
2. Suzhou Industrial Park Centers for Disease Control and Prevention, Suzhou, China.
3. Department of Epidemiology and Statistics, School of Public Health, Nanjing Medical University, Nanjing, China.