Department of Obstetrics and Gynecology, Jizhong Energy Fengfeng Group Hospital, Hebei Province, Handan 056200, China;
Department of Obstetrics and Gynecology, Jizhong Energy Fengfeng Group Hospital, Hebei Province, Handan 056200, China;
Department of Obstetrics and Gynecology, Jizhong Energy Fengfeng Group Hospital, Hebei Province, Handan 056200, China;
Department of Obstetrics and Gynecology, Jizhong Energy Fengfeng Group Hospital, Hebei Province, Handan 056200, China;
Department of Obstetrics and Gynecology, Jizhong Energy Fengfeng Group Hospital, Hebei Province, Handan 056200, China;