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American Journal of Obstetrics and Gynecology > 2009 > 200 > 5 > 504.e1-504.e5
Journal of Emergency Medicine > 1995 > 13 > 2 > 191-194+284-285
American Journal of Obstetrics and Gynecology > 2009 > 200 > 5 > 504.e1-504.e5
Journal of Emergency Medicine > 1995 > 13 > 2 > 191-194+284-285