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Lange U, Müller-Ladner U, Pfeilschifter J.Lange U, et al. Among authors: pfeilschifter j.Internist (Berl). 2011 Jul;52(7):843-52; quiz 853. doi: 10.1007/s00108-011-2851-2.Internist (Berl). 2011.PMID: 21544508Review.German.