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Sadat U, Hayes PD, Gaunt ME, Varty K, Boyle JR.Sadat U, et al.Ann R Coll Surg Engl. 2008 Jan;90(1):65-8. doi: 10.1308/003588408X242088.Ann R Coll Surg Engl. 2008.PMID: 18201505Free PMC article.