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Beyer CA, Hanssen AD, Lewallen DG, Pittelkow MR.Beyer CA, et al. Among authors: hanssen ad.J Bone Joint Surg Br. 1991 Mar;73(2):258-9. doi: 10.1302/0301-620X.73B2.2005150.J Bone Joint Surg Br. 1991.PMID: 2005150