1. Department of Medicine and Therapeutics and Institute of Digestive DiseaseThe Chinese University of Hong Kong Hong Kong
2. Department of Medicine and GeriatricsPrincess Margaret Hospital Hong Kong
3. Department of MedicineQueen Elizabeth Hospital Hong Kong
4. Department of Medicine, The University of Hong KongQueen Mary Hospital Hong Kong
5. Department of MedicineNorth District Hospital Hong Kong
6. Department of MedicinePamela Youde Nethersole Eastern Hospital Hong Kong