1. Department of Dermatology und Allergology Biederstein; Technische Universität München; Munich Germany
2. Department of Psychosomatics and Psychotherapy; University Hospital Giessen and Marburg; Giessen Germany
3. Department of Paediatric Pneumology and Immunology; Allergy-Center-Charité; Charité Universitätsmedizin Berlin; Berlin Germany
4. Department of Dermatology; University of Tübingen; Tübingen Germany
5. Allergy Research Group; Department of Dermatology; University Medical Center Freiburg; Freiburg Germany
6. Department of Otolaryngology; Center for Rhinology and Allergology Wiesbaden; Mannheim University Hospital; Mannheim Germany
7. Division for Pediatrics; St.-Marien-Hospital; Bonn Germany
8. Department of Dermatology und Allergology; Ludwig-Maximilians University; Munich Germany
9. Children's Hospital; University of Cologne; Cologne Germany
10. German Allergy and Asthma Assiciation; Mönchengladbach Germany
11. Children′s Hospital Osnabrueck; Osnabrueck Germany
12. Department of Dermatology and Allergy; Allergy-Center-Charité; Charité Universitätsmedizin Berlin; Berlin Germany
13. Institute of Medical Psychology; Justus-Liebig-Universität Giessen; Giessen Germany