Digestive Endoscopy Center;
Department of Gastroenterology;
Ruijin Hospital;
Shanghai Jiaotong University School of Medicine;
Shanghai 200025;
China;
Digestive Endoscopy Center;
Department of Gastroenterology;
Ruijin Hospital;
Shanghai Jiaotong University School of Medicine;
Shanghai 200025;
China;
Digestive Endoscopy Center;
The Sixth Affiliated Hospital of Sun Yat-sen University;
Guangzhou 510655;
China;
Digestive Endoscopy Center;
Department of Gastroenterology;
Ruijin Hospital;
Shanghai Jiaotong University School of Medicine;
Shanghai 200025;
China;
Digestive Endoscopy Center;
Department of Gastroenterology;
Ruijin Hospital;
Shanghai Jiaotong University School of Medicine;
Shanghai 200025;
China;