1. Department of Community Medicine, School of Public Health, The University of Hong Kong, Hong Kong Special Administrative Region, China
2. Faculty of Public Health, Thammasat University, Pathumthani, Thailand
3. School of Public Health, Fudan University, Shanghai, China
4. Epidemiology Branch, National Institute of Environmental Health Sciences, Research Triangle Park, North Carolina, USA
5. Pennsylvania State University College of Medicine, Hershey, Pennsylvania, USA
6. Geisinger Center for Health Research, Danville, Pennsylvania, USA