1. Institute for Diabetes Research and Metabolic Diseases of the Helmholtz Center Munich at the University of Tübingen; 72076 Tübingen Germany
2. German Center for Diabetes Research; 85764 Neuherberg Germany
3. Institute of Medical Psychology and Behavioral Neurobiology, Eberhard Karls University Tübingen; 72076 Tübingen Germany
4. fMEG Center, Eberhard Karls University Tübingen; 72076 Tübingen Germany
5. Department of Internal Medicine; Division of Endocrinology, Diabetology, Angiology, Nephrology and Clinical Chemistry, Eberhard Karls University Tübingen; 72076 Tübingen Germany
6. Department of Internal Medicine, Psychosomatic Medicine and Psychotherapy; University Hospital Tübingen; 72076 Tübingen Germany