1 Department of Vascular Surgery, West China Hospital, Sichuan University, Chengdu, China.
2 Department of Gastrointestinal Surgery, Sichuan Cancer Hospital & Institute, Sichuan Cancer Center, School of Medicine, University of Electronic Science and Technology of China, Chengdu, China.
3 Department of Pathology, Sichuan Cancer Hospital & Institute, Sichuan Cancer Center, School of Medicine, University of Electronic Science and Technology of China, Chengdu, China.
4 Department of Vascular Surgery, West China Hospital, Sichuan University, Chengdu, China. Zhaojc3@163.com.