1 Dermatology Department, Cambridge University Hospitals, Addenbrookes Hospital, Cambridge, UK
2 Department of Dermatology. Hospital General Universitario Gregorio Marañón, Madrid, Spain
3 Department of Dermatology, Centro Hospitalar Universitário do Porto, Porto, Portugal
4 CIRI, Centre International de Recherche en Infectiologie, (Team Immunology of Skin Allergy and Vaccination); INSERM, U1111; Univ Lyon; Université de Lyon 1; Ecole Normale Supérieure de Lyon; CNRS, UMR 5308, Lyon, France; Department of Dermatology and allergology, Centre Hospitalier Universitaire de Saint-Etienne, Saint-Priest-en-Jarez, France
5 Department of Dermatology, Venereology and Allergology, University Hospital Würzburg, Würzburg, Germany