Name	Info	Provider	Link
E-Cigarettes	free resource	MedlinePlus Health Information	https://medlineplus.gov/ecigarettes.html
	free resource	PubMed Central	https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/30824923/
	free resource	Europe PubMed Central	https://europepmc.org/abstract/MED/30824923
	subscription/membership/fee required	Silverchair Information Systems	https://academic.oup.com/ntr/article-lookup/doi/10.1093/ntr/ntz027