Juvenile nasopharyngeal angiofibroma: control rates and treatment costs.
D000293:Adolescent; D002648:Child; D005069:Evaluation Studies as Topic; D018219:Histiocytoma, Benign Fibrous / Q000532:radiotherapy*; D006801:Humans; D009303:Nasopharyngeal Neoplasms / Q000191:economics / Q000532:radiotherapy*; D009864:Ontario; D011878:Radiotherapy / Q000191:economics*