By BRENNAN P M   SUMMERS D M   IRONSIDE J   FITZPATRICK M O   in British Journal of Radiology

ISSN:0007-1285|82|983|e231-e234

British Institute of Radiology‎(2009)‎

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By Harkin R.   Fitzpatrick M.   O'Connell P.R.   O'Herlihy C.   in European Journal of Obstetrics and Gynecology and Reproductive Biology

ISSN:0301-2115|109|2|149-152

Elsevier‎(2003)‎

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