Examining the relationship of vaping to smoking initiation among US youth and young adults: a reality check
David T Levy, Kenneth E Warner, K Michael Cummings, David Hammond, Charlene Kuo, Geoffrey T Fong, James F Thrasher, Maciej Lukasz Goniewicz, Ron Borland
Tobacco Control Nov 2019, 28 (6) 629-635; DOI: 10.1136/tobaccocontrol-2018-054446