RT Journal Article SR Electronic T1 Tobacco industry advertising: efforts to shift public perception of big tobacco with paid media in the USA JF Tobacco Control JO Tob Control FD BMJ Publishing Group Ltd SP tobaccocontrol-2021-057189 DO 10.1136/tobaccocontrol-2021-057189 A1 Robin Koval A1 Nicole Dorrler A1 Barbara Schillo YR 2022 UL http://tobaccocontrol.bmj.com/content/early/2022/05/08/tobaccocontrol-2021-057189.abstract AB