American Journal of Obstetrics and Gynecology
American Journal of Obstetrics and Gynecology > 2007 > 196 > 5 > 489.e1-489.e7
American Journal of Obstetrics and Gynecology > 2007 > 196 > 6 > 572.e1-572.e7
American Journal of Obstetrics and Gynecology > 2007 > 197 > 1 > 58.e1-58.e6
American Journal of Obstetrics and Gynecology > 2007 > 197 > 3 > 286.e1-286.e8
American Journal of Obstetrics and Gynecology > 2007 > 197 > 4 > 381.e1-381.e7