1. Department of DermatologyCliniques universitaires Saint‐Luc Brussels Belgium
2. IREC (Institut de Recherche Experimentale et Clinique) Pôle Pneumologie, ORL, DermatologieUniversité Catholique de Louvain Brussels Belgium
3. Department of Occupational and Environmental DermatologyLund University, Skåne University Hospital Malmö Sweden
4. Department of DermatologyBlekinge Hospital Karlskrona Sweden
5. Department of DermatologyUniversity Hospitals KU Leuven Leuven Belgium