1. Unit of Dermatology, Department of Medical, Surgical and Neurological Sciences, University of Siena, Siena, Italy
2. Department of Medical Biotechnologies, University of Siena, Siena, Italy
3. Unit of Dermatology, San Giuseppe Hospital, Empoli, Florence, Italy
4. Unit of Dermatology, San Donato Hospital, Arezzo, Italy
5. Unit of Dermatology, Hospital of Campo di Marte, Lucca, Italy
6. Department of Dermatology, University of Pisa, Pisa, Italy
7. Department of Dermatology, San Jacopo Hospital, Pistoia, Italy
8. Department of Experimental and Clinical Medicine, Division of Rheumatology, University of Florence, Florence, Italy
9. Section of Dermatology, Department of Health Sciences, University of Florence, Florence, Italy