1. Department of Medical, Surgical and Neurological Science, Dermatology Section University of Siena, S. Maria alle Scotte Hospital Siena Italy
2. Department of Medical, Surgical and Neurological Science, Otorhinolaryngology Section University of Siena, S. Maria alle Scotte Hospital Siena Italy
3. Department of Human Pathology and Oncology, Anatomopathology Section University of Siena, S. Maria alle Scotte Hospital Siena Italy