Department of Internal Medicine;
Division of Gastroenterology;
Shanghai Renji Hospital;
Shanghai Institute of Digestive Disease;
Shanghai Jiaotong University School of Medicine;
Shanghai 200001;
China;
Department of Medicine GI Division;
Johns Hopkins University School of Medicine;
Baltimore MD 21205;
United States;
Department of Internal Medicine;
Division of Rheumatology;
Shanghai Renji Hospital;
Shanghai Jiaotong University School of Medicine;
Shanghai 200001;
China;