1. Department of Dermatology University Hospital Augsburg Augsburg Germany
2. Klinikum rechts der Isar, Technical University of Munich (TUM) Department of Dermatology and Allergy Biederstein Munich Germany
3. University Children's Hospital Zurich Division of Pediatric Dermatology Zurich Switzerland
4. University Hospital Zurich Department of Dermatology Zurich Switzerland
5. University Children's Hospital Zurich Division of Pediatric Allergy Zurich Switzerland
6. Praxis Pleimes for pediatric dermatology Heidelberg Germany
7. University Children's Hospital Zurich Division of Immunology Zurich Switzerland