1 Section of Dermatology, Venereology, Department of Medical, Surgical Sciences and Neurosciences, "Le Scotte" Polyclinic, University of Siena, Siena, Italy - ernesto.depiano@libero.it.
2 Department of Medical Biotechnologies, University of Siena, Siena, Italy.
3 Section of Dermatology, Venereology, Department of Medical, Surgical Sciences and Neurosciences, "Le Scotte" Polyclinic, University of Siena, Siena, Italy.
4 Section of Pathology, Department of Medical, Surgical Sciences and Neurosciences, University of Siena, Siena, Italy.