Department of Gastroenterology, Shanghai First People's Hospital, Shanghai Jiaotong University, Shanghai 200080, China;
Department of Gastroenterology, Xinhua Hospital, Shanghai Jiaotong University Medical School, Shanghai 200092, China;
Department of Gastroenterology, Shanghai First People's Hospital, Shanghai Jiaotong University, Shanghai 200080, China;
Department of Gastroenterology, Xinhua Hospital, Shanghai Jiaotong University Medical School, Shanghai 200092, China;
Department of Gastroenterology, Shanghai First People's Hospital, Shanghai Jiaotong University, Shanghai 200080, China;
Department of Gastroenterology, Xinhua Hospital, Shanghai Jiaotong University Medical School, Shanghai 200092, China;
Department of Gastroenterology, Shanghai First People's Hospital, Shanghai Jiaotong University, Shanghai 200080, China;
Department of Gastroenterology, Xinhua Hospital, Shanghai Jiaotong University Medical School, Shanghai 200092, China;