1. Department of Dermatology Hospital Niño Jesus Menendez Pelayo 65 Madrid 28034 Spain
2. Department of Dermatology Hospital Sant Joan de Deu Barcelona Spain
3. Department of Dermatology Private Clinic Madrid Spain
4. Department of Dermatology Hospital de Palamós Palamós Gerona Spain
5. Department of Medicine IBMCC and IBSAL Universidad de Salamanca‐CSIC Salamanca Spain
6. Department of Dermatology Fundación Jiménez Díaz Madrid Spain
7. Unitat de Recerca Biomédica Hospital Vall d'Hebron Barcelona Spain
8. Department of Dermatology Freiburg University Freiburg Germany