1. Department of Obstetrics and Gynecology, Xiangyang Central Hospital, Affiliated Hospital of Hubei University of Arts and Science, Xiangyang, Hubei 441000, P.R. China
2. Department of Oncology, Xiangyang Central Hospital, Affiliated Hospital of Hubei University of Arts and Science, Xiangyang, Hubei 441000, P.R. China
3. Department of Physical Examination, Xiangyang City Center for Disease Control and Prevention, Xiangyang, Hubei 441021, P.R. China