American Journal of Obstetrics and Gynecology
American Journal of Obstetrics and Gynecology > 2009 > 201 > 3 > 263.e1-263.e9
American Journal of Obstetrics and Gynecology > 2014 > 211 > 2 > 163.e1-163.e6
American Journal of Obstetrics and Gynecology > 2009 > 201 > 3 > 263.e1-263.e9
American Journal of Obstetrics and Gynecology > 2014 > 211 > 2 > 163.e1-163.e6