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Ethical issues in youth surveys: Potentials for conducting a national questionnaire study on adolescent schoolchildrens sexual experiences with adults
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In summary, these limitations, predominantly cross-sectional and self-reported study designs, absence of long-term longitudinal research, minimal mechanistic investigation in youths, and sparse data on exercise outcomes, constrain our current understanding of how e-cigarette use may affect adolescent pulmonary function and physical activity
Although products used by consumers have to undergo testing, e-cigarettes and the batteries used in e-cigarettes are not currently required to be tested for safety
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