International Journal of Gynecology & Obstetrics
International Journal of Gynecology and Obstetrics > 2008 > 100 > 2 > 171-174
International Journal of Gynecology and Obstetrics > 2008 > 100 > 3 > 257-261
International Journal of Gynecology and Obstetrics > 2008 > 100 > 3 > 248-251