1. Anorectal Surgery, Hwa Mei Hospital, University of Chinese Academy of Sciences, 41 Northwest Street Road, Haishu District, Ningbo 315800, China
2. Ningbo Institute of Life and Health Industry, University of Chinese Academy of Sciences, 41 Northwest Street Road, Haishu District, Ningbo 315800, China
3. Key Laboratory of Diagnosis and Treatment of Digestive System Tumors of Zhejiang Province, 41 Northwest Street Road, Haishu District, Ningbo 315800, China
4. Department of Medical Experiment, Hwa Mei Hospital, University of Chinese Academy of Sciences, 41 Northwest Street Road, Haishu District, Ningbo 315800, China