title: Split-course radiation therapy of carcinoma of the nasopharynx: results of a national collaborative clinical trial of the Radiation Therapy Oncology Group.
mesh_terms: D002277:Carcinoma / Q000401:mortality / Q000532:radiotherapy*; D002986:Clinical Trials as Topic; D006801:Humans; D008207:Lymphatic Metastasis; D009303:Nasopharyngeal Neoplasms / Q000401:mortality / Q000532:radiotherapy*; D011867:Radioisotope Teletherapy; D011879:Radiotherapy Dosage