Practitioners' responses to questions regarding e cigarette use among Download Table Perceptions, symptoms, and practices of electronic cigarette users: Descriptive analysis and validation of Arabic short form vaping consequences questionnaire PLOS One Stop Smoking Practitioners' understanding of e cigarettes' use and efficacy with particular reference to vapers' socioeconomic status Journal of Smoking Cessation Cambridge Core ABCdaire des outils Origin and use of the 100 cigarette criterion in tobacco surveys Tobacco Control