1. Department of Internal Medicine; Division of Endocrinology, Diabetology, Angiology, Nephrology, and Clinical Chemistry, Eberhard Karls University; Tübingen Germany
2. Institute for Diabetes Research and Metabolic Diseases of the Helmholtz Center Munich at the University of Tübingen (Paul Langerhans Institute Tübingen); Tübingen Germany
3. German Center for Diabetes Research (DZD); Neuherberg Germany
4. Department of Metabolic Neuroimaging; MEG Center, Eberhard Karls University Tübingen; Tübingen Germany
5. Department of Obstetrics and Gynecology; College of Medicine, University of Arkansas for Medical Sciences; Little Rock Arkansas USA