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American Journal of Obstetrics and Gynecology > 2014 > 210 > 2 > 134.e1-134.e9
American Journal of Obstetrics and Gynecology > 2009 > 201 > 1 > 58.e1-58.e8
American Journal of Obstetrics and Gynecology > 2014 > 210 > 2 > 134.e1-134.e9
American Journal of Obstetrics and Gynecology > 2009 > 201 > 1 > 58.e1-58.e8