The effects of graduated filters on smoking exposure: risk reduction or compensation?
D000328:Adult; D002248:Carbon Monoxide / Q000032:analysis*; D005260:Female; D005374:Filtration / Q000295:instrumentation; D006801:Humans; D008297:Male; D008875:Middle Aged; D009538:Nicotine / Q000032:analysis; D012306:Risk; D012907:Smoking; D013638:Tars / Q000032:analysis; D013997:Time Factors; D014029:Tobacco Use Disorder / Q000628:therapy*
D013638:Tars; D009538:Nicotine; D002248:Carbon Monoxide