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Xu J, Kauther MD, Hartl J, Wedemeyer C; Study was performed at the University of Duisburg - Essen, Germany.Xu J, et al. Among authors: wedemeyer c.J Orthop Surg Res. 2010 Nov 4;5:83. doi: 10.1186/1749-799X-5-83.J Orthop Surg Res. 2010.PMID: 21050480Free PMC article.