National Clinical Research Center for Digestive Diseases and Xijing Hospital of Digestive Diseases Xijing Hospital Air Force Military Medical University Xi'an Shaanxi China;
National Clinical Research Center for Digestive Diseases and Xijing Hospital of Digestive Diseases Xijing Hospital Air Force Military Medical University Xi'an Shaanxi China;
National Clinical Research Center for Digestive Diseases and Xijing Hospital of Digestive Diseases Xijing Hospital Air Force Military Medical University Xi'an Shaanxi China;
National Clinical Research Center for Digestive Diseases and Xijing Hospital of Digestive Diseases Xijing Hospital Air Force Military Medical University Xi'an Shaanxi China;
National Clinical Research Center for Digestive Diseases and Xijing Hospital of Digestive Diseases Xijing Hospital Air Force Military Medical University Xi'an Shaanxi China;
National Clinical Research Center for Digestive Diseases and Xijing Hospital of Digestive Diseases Xijing Hospital Air Force Military Medical University Xi'an Shaanxi China;
National Clinical Research Center for Digestive Diseases and Xijing Hospital of Digestive Diseases Xijing Hospital Air Force Military Medical University Xi'an Shaanxi China;