1. Centre for Health Systems and Policy Research, JC School of Public Health and Primary Care, The Chinese University of Hong Kong, Hong Kong
2. Department of Family Medicine and Primary Care, The University of Hong Kong, Hong Kong
3. Department of Social Medicine and Health Education, School of Public Health, Nanjing Medical University, Nanjing, China
4. Faculty of Infectious and Tropical Diseases, London School of Hygiene and Tropical Medicine, UK
5. Faculty of Health, Southern Cross University, Sydney, Australia
6. Tung Wah College, Hong Kong