Affiliation: | 1. Department of Gastroenterology, Changhai Hospital, Second Military Medical University/Naval Medical University, Shanghai, China;2. Department of Gastroenterology, No. 905 Hospital of The Chinese PLA, Shanghai, China;3. Department of Gastroenterology, Zhongnan Hospital of Wuhan University, Wuhan, China;4. Department of Gastroenterology, Ruijing Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China |