1. Department of Obstetrics and Gynecology, The Third Affiliated Hospital of Nanchang University, Nanchang, Jiangxi 330008, P.R. China
2. Day Operation Center, Jiangxi Maternal and Child Health Hospital, Nanchang, Jiangxi 330003, P.R. China
3. Department of Oncology, The Fourth Affiliated Hospital of Nanchang University, Nanchang, Jiangxi 330003, P.R. China