1. Department of Specialized, Diagnostic and Experimental Medicine University of Bologna, Italy;
2. Dermatology Division, Multizonale Santa Chiara Hospital, Trento, Italy;
3. Dermatology Unit, United Hospital of Ancona Polytechnic Marche University, Ancona, Italy;
4. Psoriasis Outpatient Clinic of the Polyclinic University Hospital, Modena, Italy