title: Observations of tavern patrons before and after the compulsory breath test law in Canada.
mesh_terms: D000428:Alcohol Drinking; D000434:Alcoholic Beverages; D001334:Automobile Driving; D002940:Circadian Rhythm; D000431:Ethanol / Q000097:blood*; D006801:Humans; D007878:Legislation as Topic; D009864:Ontario; D010507:Periodicity; D012919:Social Behavior
chemical_list: D000431:Ethanol