1. Institute of Epidemiology I; Helmholtz Zentrum München; German Research Centre for Environmental Health; Neuherberg Germany
2. Department of Dermatology, Venereology and Allergy; University Hospital Schleswig-Holstein; Campus Kiel Germany
3. IUF - Leibniz Research Institute for Environmental Medicine; Düsseldorf Germany
4. Medical Practice for Pediatrics; Bad Honnef Germany
5. Institute of Environmental Medicine and Hygiene Faculty of Medicine; University of Leipzig; Leipzig Germany
6. Helmholtz-Centre for Environmental Research - UFZ; Leipzig Germany
7. Department of Pediatrics; Marien-Hospital Wesel; Research Institute; Wesel Germany
8. Department of Pediatrics; Technical University of Munich; Munich Germany
9. University of Munich Medical Centre; Dr. von Hauner Children's Hospital; Munich Germany