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Ritz E, Schoner W.Ritz E, et al. Among authors: schoner w.Dtsch Med Wochenschr. 2008 Dec;133(51-52):2690-4. doi: 10.1055/s-0028-1105877. Epub 2008 Dec 9.Dtsch Med Wochenschr. 2008.PMID: 19067271German.No abstract available.