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Duffell LD, Hope N, McGregor AH.Duffell LD, et al. Among authors: mcgregor ah.Proc Inst Mech Eng H. 2014 Feb;228(2):206-10. doi: 10.1177/0954411913518747. Epub 2014 Jan 21.Proc Inst Mech Eng H. 2014.PMID: 24449800