1. Institute of Human Nutrition and Food Science, Kiel University, Kiel, Heinrich-Hecht-Platz 10, 24118 Kiel, Germany
2. Peter L. Reichertz Institute for Medical Informatics of TU Braunschweig and Hannover Medical School, 30625 Hannover, Germany
3. Department of Internal Medicine I, University Medical Centre Schleswig-Holstein, Campus Kiel, 24105 Kiel, Germany
4. Institute of Clinical Molecular Biology, Kiel University and University Medical Center Schleswig-Holstein, Campus Kiel, 24105 Kiel, Germany
5. Institute of Medical Biometry and Statistics, University of Luebeck and Medical Centre Schleswig-Holstein, Campus Luebeck, 23562 Luebeck, Germany
6. Institute of Diabetes and Clinical Metabolic Research, Kiel University, Düsternbrooker Weg 17, 24105 Kiel, Germany