1. Department of Anorectal Surgery, Pingshan District Peoples’ Hospital of Shenzhen, Shenzhen, Guangdong, China (mainland)
2. Department of Surgery, Jingshan Maternal and Child Health Family Planning Service Center, Jingshan, Hubei, China (mainland)
3. Department of Dermatology, Pingshan District Peoples’ Hospital of Shenzhen, Shenzhen, Guangdong, China (mainland)