1. Department of Epidemiology, School of Public Health and Key Laboratory of Public Health Safety (Ministry of Education), Fudan University, Shanghai, PR China
2. Department of cancer prevention, Fudan University Shanghai Cancer Center, Shanghai, PR China
3. Zigong Center for Disease Control and Prevention, Zigong, Sichuan, PR China
4. Jiangsu Provincial Center for Disease Control and Prevention, Nanjing, Jiangsu, PR China
5. Department of Public Health Sciences (Global Health/IHCAR), Karolinska Institutet, Stockholm, Sweden