title: Is contralateral neck treatment necessary in early carcinoma of the tonsil?
mesh_terms: D003037:Cobalt Radioisotopes / Q000627:therapeutic use; D006801:Humans; D011867:Radioisotope Teletherapy / Q000379:methods; D012189:Retrospective Studies; D013997:Time Factors; D014067:Tonsillar Neoplasms / Q000532:radiotherapy*; D014987:Xerostomia / Q000517:prevention & control
chemical_list: D003037:Cobalt Radioisotopes