Endoscopy Division;
Yokohama City University Medical Center;
Yokohama 232-0024;
Japan;
Endoscopy Division;
Yokohama Medical University Center Hospital;
Yokohama 232-0024;
Japan;
Department of Data Science;
Yokohama City University School of Data Science;
Yokohama 236-0004;
Japan;
Division of Gastroenterology;
Yokohama City University Graduate School of Medicine;
Yokohama 236-0004;
Japan;
Endoscopic submucosal dissection; Postoperative delayed bleeding; Third look endoscopy; Antithrombotic agents; Late phase bleeding; Phase II;