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BJOG: An International Journal of Obstetrics & Gynaecology > 126 > 13 > 1588 - 1597
BJOG: An International Journal of Obstetrics & Gynaecology > 120 > 11 > 1340 - 1347
BJOG: An International Journal of Obstetrics & Gynaecology > 126 > 13 > 1588 - 1597
BJOG: An International Journal of Obstetrics & Gynaecology > 120 > 11 > 1340 - 1347