1. Department of Epidemiology and Biostatistics, and Ministry of Education Key Laboratory of Environment and Health, and State Key Laboratory of Environmental Health (Incubating), School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei Province, China
2. Department of Psychological Medicine, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
3. UPMC Hillman Cancer Center, University of Pittsburgh, Pittsburgh, PA, USA
4. Department of Epidemiology, Graduate School of Public Health, University of Pittsburgh, Pittsburgh, PA, USA
5. Health Services and Systems Research, Duke-NUS Medical School, Singapore, Singapore
6. Saw Swee Hock School of Public Health, National University of Singapore and National University Health System, Singapore, Singapore