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Best Practice & Research Clinical Obstetrics & Gynaecology > 2012 > 26 > 2 > 243-256
Best Practice & Research Clinical Obstetrics & Gynaecology > 2006 > 20 > 2 > 321-338
Best Practice & Research Clinical Obstetrics & Gynaecology > 2012 > 26 > 2 > 243-256
Best Practice & Research Clinical Obstetrics & Gynaecology > 2006 > 20 > 2 > 321-338