1. Department
of Medical Psychology and Behavioral Neurobiology, University of Tübingen, 72076 Tübingen, Germany
2. German Center for Diabetes Research (DZD), 72076 Tübingen, Germany
3. Institute for Diabetes Research and Metabolic Diseases of the Helmholtz Centre Munich at the University of Tübingen (IDM), 72076 Tübingen, Germany