1. Department of Skin and Allergic Diseases; Helsinki University Central Hospital; Helsinki Finland
2. Department of Dermatology and Allergy; Cristo Re Hospital; Rome Italy
3. Department of Dermatology; Faculty of Medicine; University of Porto; i3S Research Institute; Porto Portugal
4. Department of Dermatology; Sant Pau Hospital; Autonomous University; Barcelona Spain
5. Department of Dermatology and Venereology; Aristotle University Medical School; Thessaloniki Greece
6. Department of Dermatology and Allergy; Hannover Medical School; Hannover Germany