1. Institute of Digestive DiseaseThe Chinese University of Hong Kong Shatin Hong Kong
2. Department of Medicine and Therapeutics, Faculty of MedicineThe Chinese University of Hong Kong Shatin Hong Kong
3. Division of Gastroenterology and HepatologyThe University of New Mexico School of Medicine Albuquerque New Mexico USA
4. Department of Advanced Medical and Surgical SciencesUniversity of Campania Luigi Vanvitelli Naples Italy
5. Colon and Rectal Surgery UnitVall d'Hebron University Hospital Barcelona Spain
6. Department of GastroenterologyJohn Hunter Hospital Newcastle New South Wales Australia
7. Department of Surgery, Faculty of MedicineThe Chinese University of Hong Kong Shatin Hong Kong