1. Department of General Surgery, Yancheng City 6th People's Hospital, Yancheng, Jiangsu 224001, P.R. China
2. Department of Geraeology and Obstetrics, Yancheng City First People's Hospital, Yancheng, Jiangsu 224001, P.R. China
3. Department of Geraeology, Yancheng City First People's Hospital, Yancheng, Jiangsu 224001, P.R. China
4. Department of Medical Oncology, Yancheng City First People's Hospital, Yancheng, Jiangsu 224001, P.R. China
5. Department of General Surgery, Yancheng City First People's Hospital, Yancheng, Jiangsu 224001, P.R. China