1 Otorhinolaryngology-Head and Neck Surgery Department, 16811Complexo Hospitalario Universitario A Coruña (CHUAC), A Coruña, Galicia, Spain.
2 Clinical Research in Medicine, International Center for Doctorate and Advanced Studies (CIEDUS), 16780Universidade de Santiago de Compostela (USC), Santiago de Compostela, Galicia, Spain.
3 Young-Otolaryngologists of the International Federations of Oto-Rhino-Laryngological Societies (YO-IFOS) Study Group, Paris, France.
4 Otorhinolaryngology-Head and Neck Surgery Department, Complexo Hospitalario Universitario Santiago de Compostela (CHUS), Santiago de Compostela, Galicia, Spain.