1. Department of Dermatology; Hospital del Mar; Universitat Autònoma de Barcelona (UAB); Barcelona Spain
2. Department of Dermatology; University Hospital Carl Gustav Carus; Technical University Dresden; Dresden Germany
3. Department of Dermatology; Leicester Royal Infirmary; Leicester UK
4. Department of Dermatology; University Hospital Erlangen; Erlangen Germany
5. Department of Dermatology; University Medical Center Groningen; University of Groningen; Groningen The Netherlands
6. Department of Dermatology; Hospital Universitario La Princesa; Madrid Spain
7. Department of Dermatology; Hospital General Universitario de Alicante; Alicante Spain
8. Department of Dermatology; Chapel Allerton Hospital; Leeds UK
9. Department of Medical Informatics, Biometry and Epidemiology; University of Erlangen-Nuremberg; Erlangen Germany