1. Otorhinolaryngology – Head and Neck Surgery Department, Complexo Hospitalario Universitario A Coruña (CHUAC), Galicia, Spain
2. Clinical Research in Medicine, International Center for Doctorate and Advanced Studies (CIEDUS), Universidade de Santiago de Compostela (USC), Galicia, Spain
3. Oral and Maxillofacial Surgery Department, Parc Taulí Hospital Universitari, Barcelona, Spain