title: Colorimetric assessment of smoking status and relative daily nicotine intakes.
authors.forename: G A
authors.initials: GA
authors.lastname: Ellard
mesh_terms: D003124:Colorimetry / Q000379:methods* / Q000706:statistics & numerical data; D006801:Humans; D009538:Nicotine / Q000652:urine*; D012907:Smoking / Q000652:urine*
chemical_list: D009538:Nicotine