Department of Biomedical Sciences, Humanitas University, Milan, Italy. Otorhinolaryngology Unit, Humanitas Clinical and Research Center-IRCCS, Milan, Italy. Department of Otolaryngology-Head and Neck Surgery, IRCCS Regina Elena National Cancer Institute, Rome, Italy. Department of Biostatistics and Bioinformatics, IRCCS Regina Elena National Cancer Institute, Rome, Italy. Otolaryngology Unit, Arcispedale Santa Maria Nuova-IRCCS, Reggio Emilia, Italy. Clinical Pathology, IRCCS Regina Elena National Cancer Institute, Rome, Italy. Endocrinology Unit, IRCCS Regina Elena National Cancer Institute, Rome, Italy. Department of Otolaryngology-Head and Neck Surgery, "Carlo Poma" Civil Hospital, Mantua, Italy. Department of Otorhinolaryngology-Head and Neck Surgery, University of Brescia, Brescia, Italy.