American Journal of Obstetrics and Gynecology
American Journal of Obstetrics and Gynecology > 2017 > 216 > 6 > 612.e1-612.e5
American Journal of Obstetrics and Gynecology > 2017 > 217 > 1 > 27-36
American Journal of Obstetrics and Gynecology > 2017 > 217 > 2 > 202.e1-202.e13