1. National Allergy Research Centre, Department of Dermatology and AllergyCopenhagen University Hospital Herlev‐Gentofte Hellerup Denmark
2. St John's Institute of DermatologyGuy's and St Thomas’ Hospital London UK
3. Department of DermatologyUniversity Hospital of Erlangen, Friedrich‐Alexander University Erlangen‐Nuremberg Erlangen Germany
4. Paul‐Ehrlich‐Institut Langen Germany
5. Dermatology DepartmentHospital General de Alicante Alicante Spain
6. Dermatology DepartmentHospital del Mar, IMIM, Universitat Autònoma Barcelona Spain