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Morris RW, Fitzpatrick R, Hajat S, Reeves BC, Murray DW, Hannen D, Rigge M, Williams O, Gregg PJ; National Total Hip Replacement Outcome Study Steering Committee.Morris RW, et al. Among authors: murray dw.Ann R Coll Surg Engl. 2001 May;83(3):190-6.Ann R Coll Surg Engl. 2001.PMID: 11432139Free PMC article.