1. School of Public Health, Sun Yat-Sen University, Guangzhou, China.
2. School of Public Health (Shenzhen), Sun Yat-Sen University, Shenzhen, China.
3. School of Public Health, Yale University, New Haven, Connecticut, USA.
4. Shizhong District Center for Disease Control and Prevention, Jinan, China.
5. Kirby Institute, University of New South Wales, Sydney, Australia.