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