American Journal of Obstetrics and Gynecology
American Journal of Obstetrics and Gynecology > 2017 > 216 > 2 > 183.e1-183.e7
American Journal of Obstetrics and Gynecology > 2017 > 216 > 4 > 411.e1-411.e14
American Journal of Obstetrics and Gynecology > 2017 > 216 > 6 > 600.e1-600.e9