Association between prolonged dual use of cigarettes and E cigarettes and psychosocial factors among U.S. Smokers: Secondary data analysis from the 2013 to 2019 PATH study ScienceDirect Quelle valeur de rsistance choisir pour sa cigarette lectronique Neovapo PDF) Patterns of E Cigarette Use Among Youth and Young Adults: Review of the Impact of E Cigarettes on Cigarette Smoking Stanford study links vaping with heightened risk of COVID 19