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Kerl H, Sterry W.Kerl H, et al. Among authors: sterry w.Dtsch Med Wochenschr. 1992 Feb 7;117(6):223-7. doi: 10.1055/s-2007-1024259.Dtsch Med Wochenschr. 1992.PMID: 1735388Review.German.No abstract available.