1. Department of Dermatology, Hospital Universitari de Bellvitge, Hospitalet de Llobregat, Spain;
2. Department of Dermatology, Hospital del Mar- Institut Mar d’Investigacions Mèdiques, Barcelona, Spain;
3. Department of Dermatology, Hospital de la Santa Creu i Sant Pau, Barcelona, Spain;
4. Department of Dermatology, Hospital de Granollers, Granollers, Spain;
5. Department of Dermatology, Hospital Vall d’Hebrón, Barcelona, Spain;
6. Department of Dermatology, Hospital de Manacor, Manacor, Spain;
7. Department of Dermatology, Hospital Germans Trias i Pujol, Badalona, Spain;
8. Department of Dermatology, Hospital del Sagrat Cor, Barcelona, Spain;
9. Department of Dermatology, Hospital Clínic de Barcelona, Barcelona, Spain;
10. Department of Dermatology, Hospital Moisses Broggi, Sant Joan Despí, Spain