International Journal of Gynecology & Obstetrics
International Journal of Gynecology and Obstetrics > 2012 > 116 > 1 > 61-63
International Journal of Gynecology and Obstetrics > 2012 > 117 > 3 > 228-233
International Journal of Gynecology and Obstetrics > 2012 > 118 > 1 > 42-46
International Journal of Gynecology and Obstetrics > 2012 > 118 > 2 > 120-122