International Journal of Gynecology & Obstetrics
International Journal of Gynecology and Obstetrics > 2004 > 86 > Supplement > S6-S16
International Journal of Gynecology and Obstetrics > 2010 > 108 > 3 > 224-227
International Journal of Gynecology and Obstetrics > 2012 > 117 > 2 > 160-163
International Journal of Gynecology and Obstetrics > 2013 > 122 > 2 > 136-139