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Felicione NJ, Cummings KM, Gravely S, Hammond D, McNeill A, Borland R, Fong GT, O’Connor RJ. “Don’t Know” Responses for Nicotine Vaping Product Features among Adult Vapers: Findings from the 2018 and 2020 ITC Four Country Smoking and Vaping Surveys. International Journal of Environmental Research and Public Health. 2021; 18(15):7928. https://doi.org/10.3390/ijerph18157928

Felicione, Nicholas J., K. Michael Cummings, Shannon Gravely, David Hammond, Ann McNeill, Ron Borland, Geoffrey T. Fong, and Richard J. O’Connor. 2021. "“Don’t Know” Responses for Nicotine Vaping Product Features among Adult Vapers: Findings from the 2018 and 2020 ITC Four Country Smoking and Vaping Surveys" International Journal of Environmental Research and Public Health 18, no. 15: 7928. https://doi.org/10.3390/ijerph18157928

Felicione, N. J., Cummings, K. M., Gravely, S., Hammond, D., McNeill, A., Borland, R., Fong, G. T., & O’Connor, R. J. (2021). “Don’t Know” Responses for Nicotine Vaping Product Features among Adult Vapers: Findings from the 2018 and 2020 ITC Four Country Smoking and Vaping Surveys. International Journal of Environmental Research and Public Health, 18(15), 7928. https://doi.org/10.3390/ijerph18157928