1. Department of Gastrointestinal Surgery, Key Laboratory of Carcinogenesis & Translational Research (Ministry of Education), Peking University Cancer Hospital, Beijing Cancer Hospital & Institute, Beijing 100142, China
2. Department of Endoscopy, Key Laboratory of Carcinogenesis & Translational Research (Ministry of Education), Peking University Cancer Hospital, Beijing Cancer Hospital & Institute, Beijing 100142, China
3. Department of Radiology, Key Laboratory of Carcinogenesis & Translational Research (Ministry of Education), Peking University Cancer Hospital, Beijing Cancer Hospital & Institute, Beijing 100142, China