1. Department of Dermatology, Allergy UnitUniversity Hospital Erlangen Erlangen Germany
2. Division of Allergology and Immunology, Department of Dermatology, Venereology and AllergologyCharité ‐ Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt‐Universität zu Berlin, and Berlin Institute of Health Berlin Germany
3. Information Network of Departments of Dermatology (IVDK)University Medicine Göttingen Göttingen Germany
4. Department of Dermatology and VenereologyUniversity Hospital Halle (Saale) Halle (Saale) Germany
5. Department of Dermatology and AllergologyUniversity Hospital of Munich; Ludwig‐Maximilian University Munich Munich Germany
6. Department of Dermatology and AllergologySaarland University Hospital Homburg Germany
7. Institute for Interdisciplinary Dermatological Prevention and Rehabilitation (iDerm)University of Osnabrück Osnabrück Germany
8. Division of AllergologyPaul‐Ehrlich‐Institut, Federal Institute for Vaccines and Biomedicines Langen Germany