1. First Department of Internal Medicine, University Medical Center, Mainz, Germany
2. Department of Internal Medicine II, HSK Hospital, Wiesbaden, Germany
3. Max Planck Institute for Plant Breeding Research Cologne, Cologne, Germany
4. Institute for Genetics, University of Cologne, Cologne, Germany
5. Institute for Pathology, University Hospital, Düsseldorf, Germany
6. First Department of Internal Medicine, University Hospital, Tübingen, Germany
7. First Department of Internal Medicine, University Hospital, Erlangen, Germany