By Bell R E   Griffiths N J   Bates T   in Annals of The Royal College of Surgeons of England

ISSN:1478-7083|85|1|14-17

The Royal College of Surgeons of England‎(2003)‎

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By Griffiths N.J.   Walton J.R.   Edwards G.B.   in Anaerobe

ISSN:1075-9964|3|2|121-125

Academic Press‎(1997)‎

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