1. Division of Upper GI and Metabolic Surgery, Department of Surgery, Faculty of Medicine The Chinese University of Hong Kong Shatin Hong Kong
2. Institute of Digestive Disease and State Key Laboratory of Digestive Diseases The Chinese University of Hong Kong Shatin Hong Kong
3. Institute of Chinese Medicine and State Key Laboratory of Research on Bioactivities and Clinical Applications of Medicinal Plants The Chinese University of Hong Kong Shatin New Territories Hong Kong
4. Nong's, PuraPharm Corporation Limited Tai Po Hong Kong
5. Division of Gastroenterology and Hepatology, Department of Medicine & Therapeutics, Faculty of Medicine The Chinese University of Hong Kong Shatin Hong Kong