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Ultrasound in Medicine & Biology > 1997 > 23 > 9 > 1311-1317
International Journal of Gynecology and Obstetrics > 1995 > 51 > 2 > 133-140
Ultrasound in Medicine & Biology > 1997 > 23 > 9 > 1311-1317
International Journal of Gynecology and Obstetrics > 1995 > 51 > 2 > 133-140