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Department of Otolaryngology, Hospital Central de Austurias, Universidad de Oviedo, Instituto Universitario de Oncologı́a de Principado de Asturias, Oviedo, Asturias, Spain
Department of Otolaryngology, Hospital Valle del Nalón, Langreo, Universidad de Oviedo, Instituto Universitario de Oncologı́a del Principado de Asturias, Asturias, Spain
Department of Otolaryngology, Hospital Central de Austurias, Universidad de Oviedo, Instituto Universitario de Oncologı́a de Principado de Asturias, Oviedo, Asturias, Spain
Department of Otolaryngology, Hospital Central de Austurias, Universidad de Oviedo, Instituto Universitario de Oncologı́a de Principado de Asturias, Oviedo, Asturias, Spain