Electron beams in radiation therapy; pattern of use.
D004583:Electrons; D006258:Head and Neck Neoplasms / Q000532:radiotherapy; D006801:Humans; D009369:Neoplasms / Q000532:radiotherapy*; D011882:Radiotherapy, High-Energy / Q000379:methods*; D012878:Skin Neoplasms / Q000532:radiotherapy; D013899:Thoracic Neoplasms / Q000532:radiotherapy