1. Department of Dermatology; Hospital Universitario de la Princesa; Madrid Spain
2. Department of Dermatology; Barts Health NHS Trust; London UK
3. Department of Dermatology; Ghent University Hospital; Ghent Belgium
4. Department of Dermatology; University of Verona; Verona Italy
5. Jean Monnet University; St Etienne France
6. Dermatologikum Hamburg; Hamburg Germany