title: The early history of radiotherapy: 1895-1939.
mesh_terms: D001918:Brachytherapy; D049672:History, 19th Century; D049673:History, 20th Century; D006801:Humans; D009369:Neoplasms / Q000532:radiotherapy*; D011878:Radiotherapy / Q000266:history* / Q000295:instrumentation; D011883:Radium / Q000627:therapeutic use
chemical_list: D011883:Radium