1. Department of Cardiology and Internal Diseases University of Warmia and Mazury Olsztyn Poland
2. Department of Human Nutrition University of Warmia and Mazury Olsztyn Poland
3. Institute of Medical Biometry and Statistics, Medical Center ‐ University of Freiburg, Faculty of Medicine University of Freiburg Freiburg Germany
4. Institute for Biometrics and Epidemiology, German Diabetes Center (DDZ), Leibniz Center for Diabetes Research Heinrich Heine University Düsseldorf Düsseldorf Germany
5. Institute for Evidence in Medicine, Medical Center ‐ University of Freiburg, Faculty of Medicine University of Freiburg Freiburg Germany