Yang Jie, Zhu Lan, Lang Jinghe
Department of Obstetrics and Gynecology, Peking Union Medical College Hospital, Chinese Academy of Medical Science, Beijing 100730, China.
Department of Obstetrics and Gynecology, Peking Union Medical College Hospital, Chinese Academy of Medical Science, Beijing 100730, China. Email:
Chin Med J (Engl). 2014;127(5):986-7.