Kitao Keisuke, Ohara Noriyuki, Funakoshi Toru, Yata Ai, Moriyama Toshitake, Morita Hiroki, Maruo Takeshi
Department of Obstetrics and Gynecology, Kobe University Graduate School of Medicine, Kobe, Japan.
Acta Obstet Gynecol Scand. 2006;85(1):116-8. doi: 10.1080/00016340500334836.