1. Department of Epidemiology and Health Statistics, Public Health College Qingdao University Qingdao China
2. Nanjing Municipal Center for Disease Control and Prevention Nanjing China
3. Department of Geriatrics Affiliated Hospital of Qingdao University Qingdao China
4. Department of Chronic Noncommunicable Disease Control and Prevention Qingdao Municipal Center for Disease Control and Prevention Qingdao China