1. Laboratory for Functional Diagnostics; Department of Physiology; Medical School; University of Novi Sad; Novi Sad Serbia
2. Section on Experimental Radiology; Department of Diagnostic and Interventional Radiology; University Hospital Tübingen; Tübingen Germany
3. Institute for Diabetes Research and Metabolic Diseases of the Helmholtz Centre Munich at the University of Tübingen; Tübingen Germany
4. German Center for Diabetes Research (DZD); Tübingen Germany