title: Exclusion, exemption and clearance...do we need them all?
authors.forename: R
authors.initials: R
authors.lastname: Clarke
mesh_terms: D001822:Body Burden; D006801:Humans; D007390:International Agencies; D011197:Potassium Radioisotopes; D011835:Radiation Protection / Q000331:legislation & jurisprudence / Q000592:standards*; D012449:Safety; D014480:United Nations
chemical_list: D011197:Potassium Radioisotopes