1. Department of Health Policy and Management, School of Public Health, Sun Yat-sen University, Guangzhou, Guangdong, China
2. Jockey Club School of Public Health and Primary Care, The Chinese University of Hong Kong, Hong Kong, China
3. Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Solna, Sweden
4. Department of Family and Preventive Medicine, and Population Health Sciences, University of UT School of Medicine, Salt Lake City, UT, USA