1. Dermatology Unit; Department of Medical; Surgical and Neuro Sciences; University of Siena; Siena Italy
2. Department of Medical Biotechnologies; University of Siena; Siena Italy
3. Anatomopathology Unit; Department of Pathology; University Hospital of St-Etienne; Saint Etienne France
4. Dermatology Unit; University Hospital of St-Etienne; Saint Etienne France