1. Jiangsu Key Laboratory of Preventive and Translational Medicine for Geriatric Diseases, School of Public Health, Medical College of Soochow University, Suzhou, Jiangsu Province, China
2. Suzhou Vocational Health College, Suzhou, Jiangsu Province, China
3. National Healthcare Group, Singapore, Singapore
4. School of Public Health, Kunming Medical University, Kunming, Yunnan Province, China
5. School of Public Health, Fudan University, Shanghai, Shanghai, China
6. Saw Swee Hock School of Public Health, National University of Singapore, Singapore, Singapore