Name	Info	Provider	Link
E-Cigarettes	free resource	MedlinePlus Health Information	https://medlineplus.gov/ecigarettes.html
	free resource	NCI CPTAC Assay Portal	https://assays.cancer.gov/CPTAC-179
	subscription/membership/fee required	Silverchair Information Systems	https://aacrjournals.org/clincancerres/article-lookup/doi/10.1158/1078-0432.CCR-14-2544