Prevalence of vaping and smoking among adolescents in Canada, England, and the United States: repeat national cross sectional surveys
BMJ (2019) - Comment
pubmed: 31221636  doi: 10.1136/bmj.l2219  issn: 0959-8138  issn: 1756-1833 

David Hammond, Jessica L Reid, Vicki L Rynard, Geoffrey T Fong, K Michael Cummings, Ann McNeill, Sara Hitchman, James F Thrasher, Maciej L Goniewicz, Maansi Bansal-Travers, Richard O’Connor, David Levy, Ron Borland, Christine M White