American Journal of Obstetrics and Gynecology
American Journal of Obstetrics and Gynecology > 2018 > 218 > 2 > 258.e1-258.e11
American Journal of Obstetrics and Gynecology > 2018 > 218 > 2 > 239.e1-239.e8
American Journal of Obstetrics and Gynecology > 2018 > 218 > 3 > 333.e1-333.e5
American Journal of Obstetrics and Gynecology > 2018 > 218 > 6 > 597.e1-597.e7