By Gilliam A D   Speake W J   Scholefield J H   Beckingham I J   in Annals of The Royal College of Surgeons of England

ISSN:1478-7083|85|1|44-46

The Royal College of Surgeons of England‎(2003)‎

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By Beckingham I. J.   Callanan M.   Louw J. A.   Bornman P. C.   in Surgical Endoscopy

ISSN:0930-2794|13|5|493-496

Springer Publishing Company ‎(1999)‎

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