1. Dermatology Department; Hospital del Mar; Barcelona Spain
2. Mathematic Department; Universidad Nacional de Educación a Distancia UNED; Barcelona Spain
3. Dermatology Department; Hospital Sagrat Cor; Barcelona Spain
4. Dermatology Department; Hospital de Bellvitge; Barcelona Spain
5. Dermatology Department; Hospital Clínic; Barcelona Spain
6. Dermatology Department; Hospital Sant Joan de Reus; Reus Spain
7. Dermatology Department; Hospital Son Espases; Palma de Mallorca Spain
8. Dermatology Department; Hospital de la Vall d ‘Hebron; Barcelona Spain