1. School of Population Medicine and Public Health, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, China
2. Nuffield Department of Population Health, University of Oxford, Oxford, UK
3. Department of Epidemiology and Biostatistics, School of Public Health, Peking University, Beijing, China
4. Department of Global Health, School of Public Health, Peking University, Beijing, China
5. APEC Health Science Academy, Peking University, Beijing, China