1. Department of Gastrointestinal Surgery The Sixth Affiliated Hospital of Sun Yat‐sen University, Guangdong Institute of Gastroenterology, Guangdong Provincial Key Laboratory of Colorectal and Pelvic Floor Diseases, Supported by National Key Clinical Discipline Guangzhou China
2. Department of Gastrointestinal Surgery The Seventh Affiliated Hospital of Sun Yat‐sen University Guangzhou China