Institution: | 1. Department of Gastroenterology, the First Medical Center, Chinese PLA General Hospital, Beijing 100853, China2. Department of Pathology, the First Medical Center, Chinese PLA General Hospital, Beijing 100853, China3. Department of Gastroenterology, the First Medical Center, Chinese PLA General Hospital, Beijing 100853, China; The Chinese PLA 73123 Troops, Fujian 350303, China |