1 Section of Oral Sciences, Department of Biomedical and Neuromotor Sciences, University of Bologna, Bologna, Italy.
2 Division of Dermatology, Department of Experimental, Diagnostic and Specialty Medicine, S. Orsola-Malpighi Hospital, University of Bologna, Bologna, Italy.
3 Division of Dermatology, IRCCS Azienda Ospedaliero-Universitaria di Bologna, Bologna, Italy.