International Journal of Gynecology & Obstetrics
International Journal of Gynecology and Obstetrics > 2007 > 97 > 1 > 2-5
International Journal of Gynecology and Obstetrics > 2012 > 117 > 3 > 278-282
International Journal of Gynecology and Obstetrics > 2014 > 127 > 1 > 25-30