1. Department of General Surgery, The First Affiliated Hospital of Nanchang University, Nanchang, Jiangxi 330006, P.R. China
2. Department of Gynecology and Obstetrics, The First Affiliated Hospital of Nanchang University, Nanchang, Jiangxi 330006, P.R. China
3. Department of Clinical Medicine, The First Affiliated Hospital of Nanchang University, Nanchang, Jiangxi 330006, P.R. China