penn state electronic cigarette dependence index Validity and Reliability of Four Instruments for E-Cigarette and Sensory Factors in E-Cigarette Use and Correlations Between These Measurements The Roswell eND scale: Brief,
The Roswell eND scale: Brief, valid assessment of nicotine dependence adults seeking to discontinue e cigarette use ScienceDirect Associations between vaping and daily cigarette consumption among individuals with psychological distress E cigarettes less addictive than cigarettes Penn State University Penn State study: Vapers report less dependence, addiction than cigarette smokers WHYY
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