1. Department of Colorectal Surgery, The First Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou 510405, China
2. Department of Dermatology, Gaozhou Hospital of Traditional Chinese Medicine Affiliated to Guangzhou University of Chinese Medicine, Gaozhou 525025, China
3. Department of Anorectal Medicine, Gaozhou Hospital of Traditional Chinese Medicine Affiliated to Guangzhou University of Chinese Medicine, Gaozhou 525025, China
4. Graduate School of China Academy of Chinese Medical Sciences, Beijing 100091, China
5. Department of Prevention and Health Care, Gaozhou Hospital of Traditional Chinese Medicine, Guangzhou University of Chinese Medicine, Gaozhou 525025, China