Oropharyngeal NeoplasmsOropharynxTonsillar NeoplasmsMouth NeoplasmsHuman papillomavirus 16Papillomavirus InfectionsCarcinoma, Squamous CellPharyngeal DiseasesDeglutition DisordersDeglutitionCandidiasis, OralGlossectomyMouthHead and Neck NeoplasmsPharyngeal NeoplasmsAlphapapillomavirusTongue NeoplasmsLip NeoplasmsNeoplasm StagingPharyngectomyPapillomaviridaeNeoplasmsRadiotherapy, Intensity-Modulated