1. Department of Dermatology Complexo Hospitalario Universitario de Vigo Vigo Spain
2. Research Unit Fundación Piel Sana Academia Española de Dermatología Madrid Spain
3. Risk Assessment Unit, Agencia Española de Medicamentos y Productos Sanitarios Madrid Spain
4. Department of Dermatology Salford Royal NHS Foundation Trust Manchester UK
5. Department of Dermatology Prince of Wales Hospital Sydney NSW Australia
6. Study Center of the Italian Group for Epidemiologic Research in Dermatology (GISED) Via Clara Maffei 424121 Bergamo Italy
7. Department of Dermatology San Bortolo Hospital Vicenza Italy