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BJOG: An International Journal of Obstetrics & Gynaecology > 124 > 7 > 1107 - 1114
BMC Pregnancy and Childbirth > 2016 > 16 > 1 > 1-9
BJOG: An International Journal of Obstetrics & Gynaecology > 122 > 12 > 1664 - 1673
BJOG: An International Journal of Obstetrics & Gynaecology > 124 > 7 > 1107 - 1114
BMC Pregnancy and Childbirth > 2016 > 16 > 1 > 1-9
BJOG: An International Journal of Obstetrics & Gynaecology > 122 > 12 > 1664 - 1673