1. Department of General Surgery, Qianjiang Central Hospital, Qianjiang, Hubei 433100, P.R. China
2. Department of Pathology, Qianjiang Central Hospital, Qianjiang, Hubei 433100, P.R. China
3. Department of Obstetrics, Qianjiang Central Hospital, Qianjiang, Hubei 433100, P.R. China
4. Department of General Surgery, Qianjiang Central Hospital, Qianjiang, Hubei 433100, P.R. China
5. Department of Traditional Chinese Medicine, Qianjiang Central Hospital, Qianjiang, Hubei 433100, P.R. China