Citation:Cornelius ME, Driezen P, Hyland A, Fong GT, Chaloupka F, Cummings KM. Trends in cigarette pricing and purchasing patterns in a sample of US smokers: Findings from the ITC US Surveys (2002–2011). Tobacco Control. 2015;24:iii4–iii10. Download CitationDOI BibTex Tagged XML DOI