Yabuta Maki, Takeuchi Kyousuke, Kitazawa Sohei, Morita Hiroki
Department of Obstetrics and Gynecology, Hyogo Prefectural Tsukaguchi Hospital, Amagaski, Japan.
Int J Gynaecol Obstet. 2010 Nov;111(2):181-2. doi: 10.1016/j.ijgo.2010.06.015. Epub 2010 Aug 12.