American Journal of Obstetrics and Gynecology
American Journal of Obstetrics and Gynecology > 2013 > 208 > 5 > 376.e1-376.e7
American Journal of Obstetrics and Gynecology > 2013 > 209 > 2 > 114.e1-114.e13
American Journal of Obstetrics and Gynecology > 2013 > 209 > 4 > 375.e1-375.e7
American Journal of Obstetrics and Gynecology > 2013 > 209 > 5 > 449.e1-449.e7