1. Information Network of Departments of Dermatology (IVDK) Institute at the University Medical Center Göttingen Göttingen Germany
2. Department of Dermatology, University Allergy Center University Hospital Carl Gustav Carus, Technical University Dresden Dresden Germany
3. Clinic for Dermatology und Venerology Vivantes Klinikum Neukölln Berlin Germany
4. Division of Immunodermatology and Allergy Research, Department of Dermatology and Allergy Hannover Medical School Hannover Germany
5. Institute for Interdisciplinary Dermatologic Prevention and Rehabilitation (iDerm) University of Osnabrück Osnabrück Germany
6. Department of Dermatology, Environmental Medicine and Health Theory University of Osnabrück Osnabrück Germany