1. Institute for Social Medicine, Epidemiology and Health Economics Charité ‐ Universitätsmedizin Berlin Berlin Germany
2. Institute of Medical Informatics, Biometry and Epidemiology (IBE) Ludwig‐Maximilians‐Universität Munich Munich Germany
3. Institute of Biometry and Clinical Epidemiology Charité ‐ Universitätsmedizin Berlin Berlin Germany
4. Department of Dermatology and Allergy Comprehensive Allergy Centre Charité Charité ‐ Universitätsmedizin Berlin Berlin Germany
5. Department of Pediatric Pulmonology, Immunology and Intensive Care Medicine Charité ‐ Universitätsmedizin Berlin Berlin Germany
6. Institute of Clinical Epidemiology and Biometry University of Wuerzburg Wuerzburg Germany
7. State Institute of Health Bavarian Health and Food Safety Authority Bad Kissingen Germany