1. General Surgery Department, Xindu District People’s Hospital of Chengdu, Sichuan Province, China
2. School of Medicine, University of Electronic Science and Technology of China, Chengdu, Sichuan Province, China
3. Sichuan Academy of Medical Sciences and Sichuan Provincial People’s Hospital, School of Medicine, University of Electronic Science and Technology of China, Chengdu, Sichuan Province, China.