1. Department of Medicine; Queen Elizabeth Hospital; Hong Kong China
2. Department of Medicine and Therapeutics; State Key Laboratory of Digestive Disease; Institute of Digestive Disease; The Chinese University of Hong Kong, Prince of Wales Hospital; Hong Kong China
3. Department of Medicine; University of Hong Kong; Queen Mary Hospital; Hong Kong China
4. Department of Medicine and Geriatrics; Tuen Mun Hospital; Hong Kong China
5. Department of Medicine and Geriatrics; Princess Margaret Hospital; Hong Kong China
6. Department of Medicine and Geriatrics; United Christian Hospital; Hong Kong China
7. Department of Medicine and Geriatrics; Kwong Wah Hospital; Hong Kong China
8. Department of Medicine and Geriatrics; Caritas Medical Centre; Hong Kong China
9. Department of Medicine; North District Hospital; Hong Kong China
10. Department of Medicine; Yan Chai Hospital; Hong Kong China
11. Department of Medicine; Pamela Youde Nethersole Eastern Hospital; Hong Kong China
12. Department of Medicine; Tseung Kwan O Hospital; Hong Kong China
13. Department of Medicine; Alice Ho Miu Ling Nethersole Hospital; Hong Kong China
14. Department of Medicine and Geriatrics; Pok Oi Hospital; Hong Kong China
15. Department of Medicine; Our Lady of Maryknoll Hospital; Hong Kong China