1. Dermatology Unit, University Polyclinic, Tor Vergata, Rome, Italy.
2. Department of Dermatology, University of Florence, Florence, Italy.
3. Institute of Dermatology, Catholic University, Rome, Italy.
4. Department of Dermatology, University of Rome, Tor Vergata, Rome, Italy.
5. Department of Health Sciences, University of Catanzaro, Catanzaro, Italy.