1. Department of Dermatology and Allergy; Comprehensive Allergy Centre, Hannover Medical School; 30625, Hannover Germany
2. Department of Dermatology; Medical Centre - University of Freiburg, Faculty of Medicine, University of Freiburg; 79104 Freiburg im Breisgau Germany
3. Department of Dermatology and Allergology; University Hospital Gießen (UKGM), Justus-Liebig-University Gießen; 35385 Giessen Germany