International Journal of Gynecology & Obstetrics
International Journal of Gynecology and Obstetrics > 2009 > 106 > 2 > 164-167
International Journal of Gynecology and Obstetrics > 2012 > 118 > Supplement 1 > S21-S27
International Journal of Gynecology and Obstetrics > 2015 > 128 > 3 > 224-227