International Journal of Gynecology & Obstetrics
International Journal of Gynecology and Obstetrics > 2012 > 116 > 1 > 52-56
International Journal of Gynecology and Obstetrics > 2012 > 117 > 3 > 268-272
International Journal of Gynecology and Obstetrics > 2012 > 118 > Supplement 1 > S28-S32
International Journal of Gynecology and Obstetrics > 2012 > 118 > Supplement 1 > S57-S61
International Journal of Gynecology and Obstetrics > 2012 > 118 > 3 > 247-250