1. Division of Abdominal Cancer, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, China
2. School of Clinical Medicine, Chengdu University of Traditional Chinese Medicine, Chengdu, Sichuan 610072, China
3. Department of Infectious Diseases, Affiliated Hospital of Chengdu University of Traditional Chinese Medicine, Chengdu, Sichuan 610072, China