American Journal of Obstetrics and Gynecology
American Journal of Obstetrics and Gynecology > 2017 > 216 > 3 > 281.e1-281.e7
American Journal of Obstetrics and Gynecology > 2017 > 216 > 4 > 417.e1-417.e8
American Journal of Obstetrics and Gynecology > 2017 > 216 > 5 > 527.e1-527.e9