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Fertility and Sterility > 2009 > 91 > 6 > 2643-2649
European Journal of Obstetrics and Gynecology > 2000 > 92 > 1 > 167-170
Fertility and Sterility > 2009 > 91 > 6 > 2643-2649
European Journal of Obstetrics and Gynecology > 2000 > 92 > 1 > 167-170