1. CDC. Health Effects of Cigarette
Smoking. https://www.cdc.gov/tobacco/data_statistics/fact_sheets/health_effects/effects_cig_smoking/index.htm (accessed April 13, 2020).
2. CDC. Current Cigarette Smoking
Among Adults in the United States. https://www.cdc.gov/tobacco/data_statistics/fact_sheets/adult_data/cig_smoking/index.htm (accessed April 13, 2020).
3. FDA. Reporting Harmful and
Potentially Harmful Constituents in Tobacco Products and Tobacco Smoke
Under Section 904(a)(3) of the Federal Food, Drug, and Cosmetic Act https://www.fda.gov/media/83375/download (accessed May 9, 2016).
4. FDA. Proposed Rule: Premarket
Tobacco Product Applications and Recordkeeping Requirements https://www.federalregister.gov/documents/2019/09/25/2019-20315/premarket-tobacco-product-applications-and-recordkeeping-requirements (accessed April 13, 2020).
5. In vitro cytoxicity profile of e‐cigarette liquid samples on primary human bronchial epithelial cells