1. Surgical Department, Huzhou Central Hospital, Zhejiang University Huzhou Hospital, Huzhou, Zhejiang 313000, P.R. China
2. Integrated Traditional Chinese and Western Medicine Surgery, Huzhou Maternal and Child Health Care Hospital, Huzhou, Zhejiang 313000, P.R. China
3. Ultrasonography Department, Huzhou Central Hospital, Zhejiang University Huzhou Hospital, Huzhou, Zhejiang 313000, P.R. China
4. Department of Gastrointestinal Surgery, Huzhou Central Hospital, Zhejiang University Huzhou Hospital, Huzhou, Zhejiang 313000, P.R. China