Digestive Endoscopy Center;
Department of Gastroenterology;
Changhai Hospital;
Naval Medical University;
Shanghai 200433;
China;
Unimed Scientific Inc.;
Wuxi 214000;
Jiangsu Province;
China;
Department of Intensive Care Unit;
Shanghai East Hospital;
Tongji University;
Shanghai 200120;
China;
Department of Medical Quality;
Medical and Health Administration;
National Health Commission of China;
Beijing 100044;
China;
Endoscopy; Gastroscopy; Colonoscopy; Endoscopic; retrograde; cholangiopancreatography; Quality; control; Predictive; model; Performance; predictor;