Affiliation: | 1. Department of Colorectal and Anal Surgery, The First Affiliated Hospital of Jilin University, Changchun, P.R. China;2. Department of Anorectal Surgery, The Afflicted Hospital to Changchun University of Chinese Medicine, Changchun, P.R. China;3. Department of Gastrointestinal Colorectal and Anal Surgery, China‐Japan Union Hospital of Jilin University, Changchun, P.R. China |