1. Department of Medical and Surgical Sciences (DIMEC), University of Bologna, 40138 Bologna, Italy
2. Dermatology Unit, IRCCS Azienda Ospedaliero-Universitaria di Bologna, 40138 Bologna, Italy
3. Institute of Dermatology, Azienda Sanitaria Universitaria Friuli Centrale (ASUFC), 33100 Udine, Italy
4. Division of Haematopathology, IRCCS Azienda Ospedaliero-Universitaria di Bologna, 40138 Bologna, Italy