RT Journal Article SR Electronic T1 E-cigarette use and promotion by social media influencers during videogame play on Twitch JF Tobacco Control JO Tob Control FD BMJ Publishing Group Ltd SP tobaccocontrol-2021-056828 DO 10.1136/tobaccocontrol-2021-056828 A1 Julia Vassey A1 Jon-Patrick Allem A1 Joshua Barker A1 Tess Boley Cruz A1 Raina Pang A1 Jennifer B Unger A1 Heather Lynn Wipfli A1 Matthew Kirkpatrick YR 2021 UL http://tobaccocontrol.bmj.com/content/early/2021/10/08/tobaccocontrol-2021-056828.abstract AB