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Research suggests that smokers of slim, long, or ultralong cigarettes may have a perception of reduced harm from their own brand. This study compared serum cotinine and urinary total 4-(methylnitrosamino)-1-(3-pyridyl)-1-butanonol (NNAL) levels among smokers of regular-sized (68-72mm), king-sized (79-88mm), and long (94-101mm) or ultralong (110-121mm) cigarettes.

Cigarette Rod Length and Its Impact on Serum Cotinine and Urinary Total NNAL Levels, NHANES 2007-2010