Department of Obstetrics and Gynecology Tongji Hospital Tongji Medical College Huazhong University of Science and Technology Wuhan Hubei 430030 China;
Department of Neurosurgery Second Hospital of Lanzhou University Lanzhou University Lanzhou Gansu 730000 China;
Department of Obstetrics and Gynecology Tongji Hospital Tongji Medical College Huazhong University of Science and Technology Wuhan Hubei 430030 China;
Department of Obstetrics and Gynecology Tujia Autonomous County Maternal and Child Health Hospital Yichang Hubei 443000 China;
Department of Obstetrics and Gynecology Tongji Hospital Tongji Medical College Huazhong University of Science and Technology Wuhan Hubei 430030 China;
Department of Obstetrics and Gynecology Tongji Hospital Tongji Medical College Huazhong University of Science and Technology Wuhan Hubei 430030 China;