American Journal of Obstetrics and Gynecology
American Journal of Obstetrics and Gynecology > 2013 > 208 > 2 > 144.e1-144.e8
American Journal of Obstetrics and Gynecology > 2013 > 208 > 5 > 343-353
American Journal of Obstetrics and Gynecology > 2013 > 209 > 3 > 200.e1-200.e7