title: Carbon monoxide level in expired air of various community groups in Japan.
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000393:Air Pollutants / Q000032:analysis*; D000395:Air Pollutants, Occupational / Q000032:analysis*; D001944:Breath Tests; D002248:Carbon Monoxide / Q000032:analysis*; D002648:Child; D004782:Environmental Health; D005260:Female; D006801:Humans; D007564:Japan; D008297:Male; D008875:Middle Aged; D009790:Occupations; D012423:Rural Health; D012621:Seasons; D012907:Smoking; D014505:Urban Population; D001335:Vehicle Emissions
chemical_list: D000393:Air Pollutants; D000395:Air Pollutants, Occupational; D001335:Vehicle Emissions; D002248:Carbon Monoxide