Indicators of dependence and efforts to quit vaping and smoking among youth in Canada, England and the USA
David Hammond, Jessica L Reid, Vicki L Rynard, Richard J O'Connor, Maciej L Goniewicz, Megan E Piper, Maansi Bansal-Travers
Tobacco Control Jan 2021, tobaccocontrol-2020-056269; DOI: 10.1136/tobaccocontrol-2020-056269