1. Department of Dermatology and Allergy; University of Bonn Medical Center; Bonn Germany
2. Division of Clinical and Molecular Allergology; Research Center Borstel; Airway Research Center North (ARCN); German Center for Lung Research (DZL); Borstel Germany
3. Interdisciplinary Allergy Outpatient Clinic; Dept. of Pneumology; University of Luebeck; Luebeck Germany