1. Clinic for Internal Medicine 2, University Hospital Regensburg, Regensburg, Germany
2. Institute of Clinical Chemistry and Laboratory Medicine, University Hospital Regensburg, Regensburg, Germany
3. Department of Psychosomatics, University Hospital Regensburg, Regensburg, Germany
4. Clinic for Internal Medicine 3, University Hospital Regensburg, Regensburg, Germany
5. Deutsches Patent- und Markenamt, München, Germany
6. Department of Genetic Epidemiology, University of Regensburg, Regensburg, Germany.