According to the Centers for Disease Control and Prevention statistics, more than a third of smokers experience at least three oral health problems and 15% of adults are smokers
The mice were housed in groups of four with enrichment, but it is unclear as to how they were grouped for the experimental inhalation procedure
(This also includes people with chronic obstructive pulmonary disease, or COPD.) The asthma data supporting this is not conclusive, however
Morris Coats, A Note on Estimating Cross-Border Effects of State Cigarette Taxes, National Tax Journal 48:4, (December 1995), 573-584, Mark Stehr, Cigarette tax avoidance and evasion , Journal of Health Economics 24:2, (March 2005), 277-297, [4] Shu Wang, David Merriman, and Frank Chaloupka, Relative Tax Rates, Proximity, and Cigarette Tax Noncompliance: Evidence from a National Sample of Littered Cigarette Packs, Public Finance Review 47:2 (March 2019), 276-311