Wuhan University - Department of Gastroenterology, Wuhan University - Key Laboratory of Hubei Province for Digestive System Disease, Wuhan University - Department of Gastroenterology, Wuhan University - Department of Gastroenterology, Wuhan University - Department of Gastroenterology, Wuhan University - Department of Gastroenterology, Wuhan University - Department of Gastroenterology, Wuhan University - Department of Gastroenterology, Wuhan University - Department of Gastroenterology, Wuhan University - Key Laboratory of Hubei Province for Digestive System Disease, Wuhan University - Department of Gastroenterology, Wuhan University - Department of Gastroenterology, Wuhan University - Department of Gastroenterology, Wuhan University - Department of Gastroenterology, Wuhan University - Department of Gastroenterology, Wuhan University - Department of Gastroenterology, Wuhan University - Department of Respiratory Medicine, Wuhan University - Infection Control Department, Wuhan University - Department of Gastroenterology, Wuhan University - Department of Gastroenterology, Wuhan University - Department of Gastroenterology, Wuhan University - Department of Gastroenterology, Wuhan University - Department of Gastroenterology, Wuhan University - Department of Gastroenterology, Wuhan University - Department of Gastroenterology, Wuhan University - Department of Gastroenterology and Wuhan University - Department of Gastroenterology