International Journal of Gynecology & Obstetrics
International Journal of Gynecology and Obstetrics > 2012 > 116 > 2 > 120-123
International Journal of Gynecology and Obstetrics > 2012 > 117 > 3 > 234-238
International Journal of Gynecology and Obstetrics > 2012 > 118 > Supplement 1 > S10-S14
International Journal of Gynecology and Obstetrics > 2012 > 118 > 2 > 166-171