title: Letter from the editors.
authors.forename: Leonard M
authors.initials: LM
authors.lastname: Freeman
authors.forename: M Donald
authors.initials: MD
authors.lastname: Blaufox
mesh_terms: D006801:Humans; D011868:Radioisotopes / Q000191:economics / Q000600:supply & distribution / Q000627:therapeutic use; D014481:United States; D014486:United States Food and Drug Administration / Q000331:legislation & jurisprudence
chemical_list: D011868:Radioisotopes