Department of Obstetrics & Gynecology,Peking Union Medical College Hospital,Peking Union Medical College,Chinese Academy of Medical Science,Beijing 100730,China;
Department of Gynecology Oacology,JiangSu Cancer Hospital,Nanjing 210009,China;
Department of Obstetrics & Gynecology,Peking Union Medical College Hospital,Peking Union Medical College,Chinese Academy of Medical Science,Beijing 100730,China;
Department of Obstetrics & Gynecology,Peking Union Medical College Hospital,Peking Union Medical College,Chinese Academy of Medical Science,Beijing 100730,China;
Department of Obstetrics & Gynecology,Peking Union Medical College Hospital,Peking Union Medical College,Chinese Academy of Medical Science,Beijing 100730,China;