1. Department of Gastroenterology, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
2. Department of Gastroenterology, Hepatology and Nutrition, Digestive Diseases and Surgery Institute, Cleveland Clinic, Cleveland, USA
3. Department of Medical Ultrasonics, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
4. Department of Radiology, The First Affiliated Hospital of Sun Yat-Sen University, Guangzhou, China
5. State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-Sen University, Guangzhou, China
6. Department of General Surgery, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
7. Department of Radiology, Hospital Clínic de Barcelona, IDIBAPS, University of Barcelona, Barcelona, Spain
8. Department of Gastroenterology, Sheba Medical Center & Sackler School of Medicine, Tel-Aviv University, Israel