1. Public Health Nutrition Unit, Technische Universität München, Freising, Germany;
2. Department of Epidemiology, German Institute of Human Nutrition Potsdam-Rehbruecke, Nuthetal, Germany;
3. Institute for Social Medicine, Epidemiology, and Health Economics, Charité University Medicine, Berlin, Germany;
4. Department of Pharmacology, German Institute of Human Nutrition Potsdam-Rehbruecke, Nuthetal, Germany;
5. Division of Endocrinology, Diabetology, Nephrology, Vascular Disease and Clinical Chemistry, the Department of Internal Medicine, University of Tübingen, Tübingen, Germany.