1. Department of Medical, Surgical and Health Sciences, Section of Otolaryngology University of Trieste Trieste Italy
2. Department of Medical, Surgical and Health Sciences, Section of Radiology University of Trieste Trieste Italy
3. Unit of Cancer Epidemiology, Centro di Riferimento Oncologico di Aviano (CRO), Istituto di Ricovero e Cura a Carattere Scientifico (IRCCS) Aviano Italy