1. Department of Epidemiology and Health Statistics School of Public Health Capital Medical University Beijing China
2. Beijing Municipal Key Laboratory of Clinical Epidemiology Capital Medical University Beijing China
3. Beijing Geriatric Healthcare Center Xuan Wu Hospital Capital Medical University Beijing China
4. Greenwood Medical Company Melbourne Victoria Australia
5. Department of Mathematics and Statistics La Trobe University Melbourne Victoria Australia
6. Global Health and Genomics School of Medical Sciences and Health Edith Cowan University Joondalup Australia