By Bhaumik J.   Pembrey M. R.   in Journal of Obstetrics & Gynaecology

ISSN:1364-6893|20|4|429-430

Informa Healthcare‎(2000)‎

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By Chudleigh T.   Chitty L.   Campbell S.   Pembrey M.   in European Journal of Ultrasound

ISSN:0929-8266|3|3|21-21

Elsevier‎(1996)‎

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