title: Introduction to the use of protons and heavy ions in radiation therapy: historical perspective.
mesh_terms: D005602:France; D006371:Helium; D049673:History, 20th Century; D006801:Humans; D007477:Ions; D009369:Neoplasms / Q000532:radiotherapy; D009683:Nuclear Medicine / Q000266:history*; D010315:Particle Accelerators; D010910:Pituitary Irradiation; D011522:Protons; D011882:Radiotherapy, High-Energy; D013548:Sweden; D014586:USSR; D014481:United States
chemical_list: D007477:Ions; D011522:Protons; D006371:Helium