Yan Yaohua, Li Li, Guo Jianxin, Zheng Yingru, Liu Qiang
Department of Obstetrics and Gynecology, Research Institute of Surgery, Daping Hospital, Third Military Medical University, Chongqing, China.
Int J Gynaecol Obstet. 2011 Nov;115(2):202-3. doi: 10.1016/j.ijgo.2011.06.018. Epub 2011 Aug 27.