1. Department of Gastrointestinal Surgery, Taizhou Hospital of Zhejiang Province, Wenzhou Medical University, Taizhou, Zhejiang 317000, P.R. China
2. Department of Endoscopic Center, Taizhou Hospital of Zhejiang Province, Wenzhou Medical University, Taizhou, Zhejiang 317000, P.R. China
3. Department of Surgical Department, Taizhou Hospital of Zhejiang Province, Wenzhou Medical University, Taizhou, Zhejiang 317000, P.R. China