1. Department of Dermatology, University Hospital “Lozano Blesa” Zaragoza, Spain;
2. Department of Dermatology, Hospital de Barbastro, Barbastro, Spain;
3. Department of Pathology, Hospital de Barbastro, Barbastro, Spain;
4. Aragon Health Service, Hospital de Barbastro, Barbastro, Spain;
5. Department of Dermatology, Hospital San Jorge, Huesca, Spain