1. Institute for Community Medicine , University Medicine Greifswald , Greifswald , Germany
2. DONALD Study Dortmund, Department of Nutritional Epidemiology , Institute of Nutrition and Food Science (IEL) , University of Bonn , Dortmund , Germany
3. Institute of Hygiene and Environmental Medicine , University Medicine Greifswald , Greifswald , Germany
4. Thuringian Regional Institute for Agriculture , Jena , Germany
5. Department of Epidemiology and Health Monitoring , Robert Koch Institute , Berlin , Germany