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BJOG: An International Journal of Obstetrics & Gynaecology > 131 > 3 > 334 - 342
Ultrasound in Obstetrics & Gynecology > 62 > 2 > 202 - 208
BJOG: An International Journal of Obstetrics & Gynaecology > 131 > 3 > 334 - 342
Ultrasound in Obstetrics & Gynecology > 62 > 2 > 202 - 208