Naval Medical University - Division of Colorectal Surgery, Tongji University - Institute of Higher Education, Naval Medical University - Division of Colorectal Surgery, Tongji University - Department of Gastrointestinal Surgery, Shanghai University of Traditional Chinese Medicine - Department of Gastroenterology, Tongji University - Department of Gastrointestinal Surgery, Shanghai Jiao Tong University (SJTU) - Department of Neurology, Tongji University - Department of Gastrointestinal Surgery, Tongji University - Department of Gastrointestinal Surgery, Tongji University - Department of Gastrointestinal Surgery, Fudan University - Department of Colorectal Surgery, Government of the People's Republic of China - Department of Anorectal Surgery and Fudan University - Department of Colorectal Surgery