1. Department of Obstetrics and Gynecology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China
2. Department of Obstetrics and Gynecology, Wuhan Central Hospital, Wuhan, Hubei, China
3. Department of Obstetrics and Gynecology, Nanjing Drum Tower Hospital, The Affiliated Hospital of Nanjing University Medical School, Nanjing, Jiangsu, China
4. Hubei Tumor Hospital, Wuhan, Hubei, China
5. Shanghai Jiao Tong University School of Medicine, Shanghai, China
6. Xinhua Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
7. Department of Internal Medicine, Luohe Renmin Hospital, The First Affiliated Hospital of Luohe Medical College, Luohe, Henan, China
8. Department of Obstetrics and Gynecology, University Hospital of Hubei University for Nationalities, Enshi, Hubei, China