Omar, M.
Hitchman, S.C.
Yong, H.H.
Barrientos-Gutierrez, T.
Willemsen, M.C.
Bianco, E.
Boado, M.
Goma, F.M.
Seo, H.G.
Nargis, N.
Jiang, Y.
Perez, C.A.
Fong, G.T.
Prevalence of awareness, ever-use and current use of nicotine vaping products (NVPs) among adult current smokers and ex-smokers in 14 countries with differing regulations on sales and marketing of NVPs: Cross-sectional findings from the ITC Project.