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Acta Obstetricia et Gynecologica Scandinavica > 93 > 5 > 469 - 476
American Journal of Obstetrics and Gynecology > 2008 > 198 > 2 > 175.e1-175.e6
Acta Obstetricia et Gynecologica Scandinavica > 93 > 5 > 469 - 476
American Journal of Obstetrics and Gynecology > 2008 > 198 > 2 > 175.e1-175.e6