American Journal of Obstetrics and Gynecology
American Journal of Obstetrics and Gynecology > 2018 > 218 > 2(S) > S829-S840
American Journal of Obstetrics and Gynecology > 2018 > 218 > 3 > 287-293.e1
American Journal of Obstetrics and Gynecology > 2018 > 218 > 5 > 483-489
American Journal of Obstetrics and Gynecology > 2018 > 218 > 6 > 612.e1-612.e6