International Journal of Gynecology & Obstetrics
International Journal of Gynecology and Obstetrics > 2012 > 116 > 1 > 64-66
International Journal of Gynecology and Obstetrics > 2012 > 118 > 3 > 220-222
International Journal of Gynecology and Obstetrics > 2012 > 119 > 1 > 18-20