1. Division of Gastroenterology, Veterans General Hospital‐Taipei and National Yang‐Ming University School of Medicine, Taipei, Taiwan
2. Department of Medicine, Veterans General Hospital‐Taipei and National Yang‐Ming University School of Medicine, Taipei, Taiwan
3. Department of Pathology, Veterans General Hospital‐Taipei and National Yang‐Ming University School of Medicine, Taipei, Taiwan
4. Department of Radiology, Veterans General Hospital‐Taipei and National Yang‐Ming University School of Medicine, Taipei, Taiwan
5. Department of Surgery, Veterans General Hospital‐Taipei and National Yang‐Ming University School of Medicine, Taipei, Taiwan