1. Department of Medicine; The University of Hong Kong, Queen Mary Hospital; Hong Kong
2. Institute of Digestive Disease; The Chinese University of Hong Kong; Hong Kong
3. School of Public Health; University of Hong Kong; Hong Kong
4. Department of Medicine; Tuen Mun Hospital; Hong Kong
5. Department of Medicine; United Christian Hospital; Hong Kong
6. Department of Medicine; Princess Margaret Hospital; Hong Kong
7. Department of Medicine; Pamela Youde Nethersole Eastern Hospital; Hong Kong
8. Department of Medicine; Tseung Kwan O Hospital; Hong Kong
9. Department of Medicine; North District Hospital; Hong Kong
10. Department of Medicine; Queen Elizabeth Hospital; Hong Kong
11. Department of Medicine; Caritas Medical Center; Hong Kong
12. Department of Medicine; Kwong Wah Hospital; Hong Kong
13. Department of Medicine; Alice Ho Miu Ling Nethersole Hospital; Hong Kong