title: History of the use of neutrons in radiation therapy.
mesh_terms: D005060:Europe; D005214:Fast Neutrons; D049673:History, 20th Century; D006801:Humans; D009369:Neoplasms / Q000532:radiotherapy*; D009502:Neutrons; D009683:Nuclear Medicine / Q000266:history*; D010315:Particle Accelerators / Q000266:history; D011882:Radiotherapy, High-Energy / Q000266:history; D014481:United States