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International Journal of Gynecology and Obstetrics > 1998 > 61 > 1 > 33-38
American Journal of Obstetrics and Gynecology > 1996 > 174 > 6 > 1925-1933
International Journal of Gynecology and Obstetrics > 1995 > 51 > 1 > 49-52
International Journal of Gynecology and Obstetrics > 1995 > 51 > 1 > 49-52
International Journal of Gynecology and Obstetrics > 1995 > 49 > 1 > 47-50