1 Department of Medical, Surgical and Health Sciences, Section of Otolaryngology, University of Trieste, 34149, Trieste, Italy paolo.boscolorizzo@units.it.
2 Unit of Cancer Epidemiology, Centro di Riferimento Oncologico di Aviano (CRO) IRCCS, Aviano, Italy.
3 Department of Medical, Surgical and Experimental Sciences, Maxillofacial Surgery Operative Unit, University of Sassari, Sassari, Italy.