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American Journal of Obstetrics and Gynecology > 2007 > 196 > 2 > 147.e1-147.e8
American Journal of Obstetrics and Gynecology > 1998 > 179 > 6 Part 1 > 1632-1639
American Journal of Obstetrics and Gynecology > 2007 > 196 > 2 > 147.e1-147.e8
American Journal of Obstetrics and Gynecology > 1998 > 179 > 6 Part 1 > 1632-1639