1. Department of Dermatology; Hospital Infantil Niño Jesús; Madrid Spain
2. Department of Dermatology; Hospital La Paz; Madrid Spain
3. Department of Dermatology; Hospital San Joan de Deu; Barcelona Spain
4. Department of Pathology; Hospital Infantil Niño Jesús; Madrid Spain
5. Department of Pathology; Hospital La Paz; Madrid Spain
6. Department of Pathology; Hospital San Joan de Deu; Barcelona Spain