Name	Info	Provider	Link
E-Cigarettes	free resource	MedlinePlus Health Information	https://medlineplus.gov/ecigarettes.html
	free resource	scite Smart Citations	https://scite.ai/reports/28541517
	subscription/membership/fee required	Silverchair Information Systems	https://academic.oup.com/ntr/article-lookup/doi/10.1093/ntr/ntx110