Liu Jing, Meng Tao, Yang Xiuhua, Zhao Ge, Li Bai
Department of Obstetrics and Gynecology, The First Affiliated Hospital of China Medical University, Shenyang, People's Republic of China.
Department of Obstetrics and Gynecology, The First Affiliated Hospital of China Medical University, Shenyang, People's Republic of China.
Taiwan J Obstet Gynecol. 2015 Dec;54(6):788-90. doi: 10.1016/j.tjog.2015.10.016.