By Winters U.   Keating P. J.   in Journal of Obstetrics & Gynaecology

ISSN:1364-6893|29|6|539-541

Informa Healthcare‎(2009)‎

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By Blades R.A.   Keating P.J.   McWilliam L.J.   George N.J.R.   Stern P.L.   in Urology

ISSN:0090-4295|46|5|681-687

Elsevier‎(1995)‎

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