1. Clinical Medicine College, Chengdu University of Traditional Chinese Medicine, Chengdu, China
2. Department of Clinical Medicine, North Sichuan Medical College, Nanchong, China
3. Department of Clinical Medicine of Combination of Chinese and Western Medicine, North Sichuan Medical College, Nanchong, China
4. Division of Anorectal, Department of Integrated Traditional Chinese and Western Medicine, Affiliated Hospital of North Sichuan Medical College, Nanchong, China