Department of Surgery, First Affiliated Hospital, Sun Yat-sen University, Guangzhou 510080, China;
Department of Surgery, First Affiliated Hospital, Sun Yat-sen University, Guangzhou 510080, China;
Department of Surgery, First Affiliated Hospital, Sun Yat-sen University, Guangzhou 510080, China;
Department of Surgery, First Affiliated Hospital, Sun Yat-sen University, Guangzhou 510080, China;
Department of Surgery, First Affiliated Hospital, Sun Yat-sen University, Guangzhou 510080, China;