1. Department of Dermatology ; Hospital del Niño Jesús; Menendez Pelayo 65 Madrid 28034 Spain
2. Department of Medicine; IBMCC and IBSAL; Universidad de Salamanca-CSIC; Salamanca Spain
3. Department of Pathology; Hospital del Niño Jesús; Menendez Pelayo 65 Madrid 28034 Spain
4. Department of Dermatology; Fundación Jiménez Díaz; Madrid Spain
5. Department of Dermatology; Freiburg University Medical Center; Freiburg Germany