1. High-Field Magnetic Resonance Centre; Max-Planck-Institute for Biological Cybernetics; Tübingen Germany
2. Deparment of Internal Medicine I, Division of Endocrinology and Metabolism; Berufgenossenschaftliches University Hospital Bergmannsheil, Ruhr-University Bochum; Bochum Germany
3. Medical Department II, Diabetology and Endocrinology; St Vinzenz Hospital; Cologne Germany
4. Department of Gastroenterology, Hepatology and Endocrinology; Hannover Medical School; Hannover Germany
5. Department of Clinical Radiology; University Hospital Münster; Münster Germany
6. Department for Biomedical Magnetic Resonances; University of Tübingen; Tübingen Germany
7. Radiological Physics; University Hospital Basel; Basel Switzerland