title: Improved CO monitors for validating smoking abstinence by expired-air carbon monoxide levels.
authors.forename: P
authors.initials: P
authors.lastname: Hajek
authors.forename: M
authors.initials: M
authors.lastname: Belcher
mesh_terms: D001944:Breath Tests / Q000295:instrumentation*; D002248:Carbon Monoxide / Q000032:analysis*; D005500:Follow-Up Studies; D006801:Humans; D006859:Hydrogen / Q000032:analysis; D007787:Lactose Intolerance / Q000503:physiopathology; D008297:Male; D012907:Smoking / Q000503:physiopathology / Q000628:therapy*
chemical_list: D002248:Carbon Monoxide; D006859:Hydrogen