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Müller-Quernheim J, Zissel G, Schopf R, Vollmer E, Schlaak M.Müller-Quernheim J, et al.Dtsch Med Wochenschr. 1996 Nov 22;121(47):1462-6. doi: 10.1055/s-2008-1043169.Dtsch Med Wochenschr. 1996.PMID: 8983896German.