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Eckardt A, Kreitner KF.Eckardt A, et al. Among authors: kreitner kf.Z Orthop Ihre Grenzgeb. 1995 Jul-Aug;133(4):303-5. doi: 10.1055/s-2008-1039796.Z Orthop Ihre Grenzgeb. 1995.PMID: 7571795German.