Affiliation: | 1. Institute of Pathology of the University of Tübingen, Federal Republic of Germany 2. Department of Internal Medicine of the University of Essen, Federal Republic of Germany 3. Department of Internal Medicine of the University of Munich, Federal Republic of Germany 4. Department of Internal Medicine of the University of Bonn, Federal Republic of Germany 5. Department of Internal Medicine of the University of Freiburg, Federal Republic of Germany 6. Department of Internal Medicine of the University of Münster, Federal Republic of Germany 7. Department of Internal Medicine of the University of G?ttingen, Federal Republic of Germany
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