1. Department of Family Medicine and Primary Care, University of Hong Kong, Hong Kong; Bau Institute of Medical and Health Sciences Education, University of Hong Kong, Hong Kong
2. Department of Family Medicine and Primary Care, University of Hong Kong, Hong Kong
3. Department of Medicine, University of Hong Kong, Hong Kong
4. Department of Surgery, University of Hong Kong, Hong Kong
5. School of Biomedical Sciences, The Chinese University of Hong Kong, Hong Kong