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Hofmann S, Kramer J, Vakil-Adli A, Aigner N, Breitenseher M.Hofmann S, et al. Among authors: aigner n.Orthop Clin North Am. 2004 Jul;35(3):321-33, ix. doi: 10.1016/j.ocl.2004.04.005.Orthop Clin North Am. 2004.PMID: 15271540Review.