American Journal of Obstetrics and Gynecology
American Journal of Obstetrics and Gynecology > 2018 > 218 > 3 > 335.e1-335.e6
American Journal of Obstetrics and Gynecology > 2018 > 218 > 3 > 324.e1-324.e11
American Journal of Obstetrics and Gynecology > 2018 > 218 > 6 > 549-562