European Journal of Obstetrics & Gynecology and Reproductive Biology
European Journal of Obstetrics and Gynecology > 2013 > 170 > 1 > 202-205
European Journal of Obstetrics and Gynecology > 2013 > 170 > 2 > 468-473
European Journal of Obstetrics and Gynecology > 2013 > 170 > 2 > 501-506