1. Department of Oncology, Hebei General Hospital, Shijiazhuang, People’s Republic of China
2. Department of Gynaecology, Hebei General Hospital, Shijiazhuang, People’s Republic of China
3. Department of Biochemistry and Molecular Biology, Hebei University of Chinese Medicine, Shijiazhuang, People’s Republic of China
4. Teaching and Research Section of Obstetrics and Gynaecology, Hebei Medical University, Shijiazhuang, People’s Republic of China