1. Institute for Clinical Chemistry and Pathobiochemistry, Department for Diagnostic Laboratory Medicine, University Hospital Tübingen, Tübingen, Germany
2. Department of Sports Medicine, University Hospital Tübingen, Tübingen, Germany
3. Interfaculty Research Institute for Sports and Physical Activity, University of Tübingen, Tübingen, Germany
4. Institute for Diabetes Research and Metabolic Diseases of the Helmholtz Zentrum München at the University of Tübingen, Tübingen, Germany
5. German Center for Diabetes Research (DZD)
6. Department of Internal Medicine IV, University Hospital Tübingen, Tübingen, Germany
7. Section on Experimental Radiology, Department of Diagnostic and Interventional Radiology, University Hospital Tübingen, Tübingen, Germany