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Ultrasound in Obstetrics & Gynecology > 63 > 3 > 365 - 370
Ultrasound in Obstetrics & Gynecology > 63 > 2 > 181 - 188
BJOG: An International Journal of Obstetrics & Gynaecology > 126 > 5 > 569 - 578
Ultrasound in Obstetrics & Gynecology > 44 > 5 > 557 - 561
Ultrasound in Obstetrics & Gynecology > 37 > 6 > 663 - 667
European Journal of Obstetrics and Gynecology > 2005 > 119 > 1 > 56-59