American Journal of Obstetrics and Gynecology
American Journal of Obstetrics and Gynecology > 2005 > 193 > 4 > 1344-1352
American Journal of Obstetrics and Gynecology > 2009 > 200 > 3 > 296.e1-296.e9
American Journal of Obstetrics and Gynecology > 2016 > 215 > 2 > 204.e1-204.e11