American Journal of Obstetrics and Gynecology
American Journal of Obstetrics and Gynecology > 2017 > 216 > 4 > 407.e1-407.e5
American Journal of Obstetrics and Gynecology > 2017 > 216 > 6 > 598.e1-598.e11
American Journal of Obstetrics and Gynecology > 2017 > 216 > 6 > 614.e1-614.e7