1. Department of Dermatology; Hospital Universitario Reina Sofía; Córdoba Spain
2. Department of Dermatology; Hospital Clínico de Salamanca; Salamanca Spain
3. Department of Dermatology; Instituto Valenciano de Oncología; Valencia Spain
4. Paediatric Dermatology Section; Department of Dermatology; Hospital Universitario La Paz; Madrid Spain