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Leyvraz S, Hess U, Flesch G, Bauer J, Hauffe S, Ford JM, Burckhardt P.Leyvraz S, et al. Among authors: bauer j.J Natl Cancer Inst. 1992 May 20;84(10):788-92. doi: 10.1093/jnci/84.10.788.J Natl Cancer Inst. 1992.PMID: 1573666