1. Medical Center—University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
2. Clinical Center of the University of Pécs, Medical School, University of Pécs, Pécs, Hungary
3. Institute of Medical Biometry and Statistics, Faculty of Medicine and Medical Center, University of Freiburg, Freiburg, Germany
4. Competence Center for Nutrition, Bavarian State Ministry for Food, Agriculture and Forestry, Freising, Germany