1. Department of Hepatobiliary Surgery, Xingtai People's Hospital of Hebei Medical University, Xingtai, Hebei 054001, P.R. China
2. Department of Neurology, Peking University Third Hospital, Beijing 100191, P.R. China
3. Department of Obstetrics and Gynecology, The Second Hospital of Hebei Medical University, Shijiazhuang, Hebei 050000, P.R. China
4. Department of Gynecological Endocrinology, Beijing Obstetrics and Gynecology Hospital, Capital Medical University, Beijing 100191, P.R. China
5. Department of Obstetrics and Gynecology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan 450052, P.R. China
6. Department of Pathology, Xingtai People's Hospital of Hebei Medical University, Xingtai, Hebei 054001, P.R. China
7. Department of Nuclear Medicine, Xingtai People's Hospital of Hebei Medical University, Xingtai, Hebei 054001, P.R. China
8. Department of Oral Surgery, Hebei Provincial Eye Hospital, Xingtai, Hebei 054001, P.R. China