International Journal of Gynecology & Obstetrics
International Journal of Gynecology and Obstetrics > 2008 > 100 > 2 > 109-115
International Journal of Gynecology and Obstetrics > 2008 > 101 > 1 > 107-111
International Journal of Gynecology and Obstetrics > 2008 > 103 > 2 > 140-143