1. Jockey Club School of Public Health and Primary Care, the Chinese University of Hong Kong, Hong Kong SAR, China
2. Centre for Health Systems and Policy Research, the Chinese University of Hong Kong, Hong Kong SAR, China
3. Institute of Sociology, Academia Sinica, Taipei, Taiwan
4. Department of Occupational and Environmental Health, School of Public Health, Sun Yat-sen University, Guangzhou, China
5. Department of Sociology, the Chinese University of Hong Kong, Hong Kong SAR, China
6. Department of Biomedical Sciences, City University of Hong Kong, Hong Kong SAR, China
7. School of Public Health, Zhengzhou University, Zhengzhou, China