1. The Jockey Club School of Public Health and Primary Care, Faculty of Medicine Chinese University of Hong Kong Hong Kong China
2. Centre for Health Education and Health Promotion, Faculty of Medicine Chinese University of Hong Kong Hong Kong China
3. The Chinese Academy of Medical Sciences and The Peking Union Medical College Hong Kong China
4. The School of Public Health The Peking University Hong Kong China
5. S.H. Ho Centre for Digestive Health, Institute of Digestive Disease Chinese University of Hong Kong Hong Kong China
6. Department of Medicine and Therapeutics Chinese University of Hong Kong Hong Kong China