Department of General Surgery, Peking University Third Hospital, Beijing 100191, China;
Department of General Surgery, Peking University Third Hospital, Beijing 100191, China;
Department of General Surgery, Peking University Third Hospital, Beijing 100191, China;
Department of Pathology, Peking University Health Science Center,Beijing 100191, China;
Peking University Third Hospital Research Center of Clinical Epidemiology, Beijing 100191, China;
Department of General Surgery, Peking University Third Hospital, Beijing 100191, China;
Department of General Surgery, Peking University Third Hospital, Beijing 100191, China;