1. Department of Oncology, The Second People's Hospital of Taizhou City, Taizhou, Jiangsu 225300, P.R. China
2. Department of Oncology, Second Hospital of Shandong University, Jinan, Shandong 250000, P.R. China
3. Department of Obstetrics and Gynecology, The Second People's Hospital of Taizhou City, Taizhou, Jiangsu 225300, P.R. China