Changes in overwrap and butt length of American filter cigarettes. An influence on reported tar yields.
D005374:Filtration; D009538:Nicotine / Q000032:analysis* / Q000633:toxicity; D012907:Smoking; D013638:Tars / Q000032:analysis* / Q000633:toxicity; D014481:United States
D013638:Tars; D009538:Nicotine