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Bitzer M, Kaiserling E, Horger MS, Nehls O, Porschen R, Gregor M, Klump B.Bitzer M, et al. Among authors: klump b.Internist (Berl). 2004 Feb;45(2):211-5. doi: 10.1007/s00108-003-1102-6.Internist (Berl). 2004.PMID: 14991163German.
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