1. Department of Dermatology; University Hospital Antwerp (UZA) and University of Antwerp (UA); 2650 Antwerp Belgium
2. Department of Occupational and Environmental Dermatology; Skåne University Hospital, Lund University; 214 28 Malmö Sweden
3. Allergology Unit, Department of Dermatology; Hôpital Saint Eloi CHU Montpellier; 34295 Montpellier Cedex 5 France