1. Division of Allergy and Immunology Department of Dermatology and Allergy Charité Universitätsmedizin Berlin Berlin Germany
2. Department of Dermatology University Allergy Center University Hospital Carl Gustav Carus Technical University Dresden Germany
3. Department of Dermatology University Hospital Jena Jena Germany
4. Department of Dermatology University Hospital Erlangen Erlangen Germany
5. Division of Dermatology Queen's University Kingston ON Canada
6. LEO Pharma A/S Ballerup Denmark