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International Journal of Gynecology and Obstetrics > 1996 > 52 > 1 > 33-36
American Journal of Obstetrics and Gynecology > 1995 > 173 > 4 > 1325-1328
International Journal of Gynecology and Obstetrics > 1996 > 52 > 1 > 33-36
American Journal of Obstetrics and Gynecology > 1995 > 173 > 4 > 1325-1328