1. Division of Gastroenterology, Department of Internal Medicine, Second Hospital of Shanxii Medical University, Taiyuan, Shanxi, China (mainland)
2. Division of Gastroenterology, Department of Internal Medicine, Second Hospital of Shanxi Medical University, Taiyuan, Shanxi, China (mainland)
3. Department of Radiology, Second Hospital of Shanxi Medical University, Taiyuan, Shanxi, China (mainland)
4. Department of Pathology, Second Hospital of Shanxi Medical University, Taiyuan, Shanxi, China (mainland)
5. Department of Surgery, Second Hospital of Shanxi Medical University, Taiyuan, Shanxi, China (mainland)
6. Department of Pathology, Stony Brook University Hospital, Stony Brook, USA