1. 1Section of Clinical Epidemiology, Department of Community Medicine, Graduate School of Medicine, Kyoto University, Kyoto, Japan
2. 2Department of Radiology, Keijinkai Maruyama Clinic, Sapporo, Japan
3. 3Section on Experimental Radiology, Department of Radiology, Eberhard-Karls University, Tübingen, Germany
4. 4German Center for Diabetes Research (DZD), Neuherberg, Germany
5. 5Institute for Diabetes Research and Metabolic Diseases, Helmholtz Center Munich, University of Tübingen, Tübingen, Germany
6. 6Department of Healthcare Epidemiology, School of Public Health, Graduate School of Medicine, Kyoto University, Kyoto, Japan
7. 7Department of Health Checkup and Promotion, Keijinkai Maruyama Clinic, Sapporo, Japan
8. 8Department of Radiology, Teine Keijinkai Hospital, Sapporo, Japan
9. 9Center for Gastroenterology, Teine Keijinkai Hospital, Sapporo, Japan
10. 10Division of Diabetology, Endocrinology and Nephrology, Department of Internal Medicine, Eberhard-Karls University, Tübingen, Germany
11. 11German Diabetes Center (DDZ), Leibniz Center for Diabetes Research, Heinrich-Heine-University Düsseldorf, Düsseldorf, Germany
12. 12Department of Endocrinology and Diabetology, University Hospital Düsseldorf, Heinrich-Heine-University Düsseldorf, Düsseldorf, Germany
13. 13Department for Diagnostic Laboratory Medicine, Institute for Clinical Chemistry and Pathobiochemistry, University Hospital Tübingen, Tübingen, Germany
14. 14Department of Internal Medicine I, University of Ulm, Ulm, Germany