1. U.S. Food and Drug Administration. Press announcement: candy and fruit flavored cigarettes now illegal in United States; Step is First Under New Tobacco Law. Published 22 September 2009. http://www.fda.gov/NewsEvents/Newsroom/PressAnnouncements/ucm183211.htm (accessed May 2016).
2. U.S. Food and Drug Administration. Deeming tobacco products to be subject to the Federal Food, Drug, and Cosmetic Act, as amended by the Family Smoking Prevention and Tobacco Control Act. Published May, 2016. http://www.fda.gov/TobaccoProducts/Labeling/RulesRegulationsGuidance/ucm394909.htm (accessed May 2016).
3. Stanford Research into the Impact of Tobacco Advertising (SRITA). Electronic cigarette online database. http://tobacco.stanford.edu/tobacco_main/main_ecigs.php (accessed May 2016).
4. Stanford Research Into the Impact of Tobacco Advertising (SRITA). Collection of unicorn e-juice flavor advertisements. http://tobacco.stanford.edu/tobacco_main/images_ecigs.php?token2=fm_ecigs_st601.php&token1=fm_ecigs_img29447.php&theme_file=fm_ecigs_mt066.php&theme_name=Flavors&subtheme_name=Unicorns (accessed May 2016).