RT Article T1 Examining the relationship of vaping to smoking initiation among US youth and young adults: A reality check JF Tobacco control VO 28 IS 6 SP 629 OP 629 A1 Levy, D.T. A2 Borland, R. A2 Goniewicz, M.L. A2 Thrasher, J.F. A2 Fong, G.T. A2 Kuo, Chin A2 Hammond, D. A2 Michael Cummings, K. A2 Warner, K.E. LA English YR 2019 UL https://krimdok.uni-tuebingen.de/Record/1912547627 DO 10.1136/tobaccocontrol-2018-054446