Leyre González-Vallejo, MD1; Javier Blanco-Sainzdelamaza, MD2; Arrate Querejeta-Ayerra, MD1; Carlos Chiesa-Estomba, MD, MSc, PhD.3
1Radiotherapy Department, Donostia University Hospital, San Sebastian, Spain; 2Medical University of Bialystok, Bialystok, Poland; 3Department of Otorhinolaryngology and Head and Neck Surgery, Donostia University Hospital, San Sebastian, Spain.