1. Section on Experimental Radiology, Department of Diagnostic and Interventional Radiology; University Hospital Tübingen; Germany
2. Institute for Diabetes Research and Metabolic Diseases (IDM) of the Helmholtz Center Munich at the University of Tübingen; Germany
3. German Center for Diabetes Research (DZD); Neuherberg Germany
4. Department of Endocrinology and Diabetology, Angiology, Nephrology and Clinical Chemistry; University Hospital Tübingen; Germany
5. Department of Diagnostic and Interventional Radiology; University Hospital Tübingen; Germany