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Fritscher-Ravens A, Petrasch S, Tiemann M, Wacker H, Dörr T, Kemmeries G, Hilgers W, Reinacher-Schick A, Kunstmann E, Schmiegel W.Fritscher-Ravens A, et al. Among authors: petrasch s.Acta Haematol. 1999;102(2):77-82. doi: 10.1159/000040974.Acta Haematol. 1999.PMID: 10529510Clinical Trial.