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International Journal of Gynecology and Obstetrics > 2004 > 85 > 2 > 190-194
European Journal of Obstetrics and Gynecology > 2000 > 89 > 1 > 81-84
International Journal of Gynecology and Obstetrics > 2004 > 85 > 2 > 190-194
European Journal of Obstetrics and Gynecology > 2000 > 89 > 1 > 81-84