Name	Info	Provider	Link
	subscription/membership/fee required	Ingenta plc	https://www.annualreviews.org/content/journals/10.1146/annurev-pharmtox-010617-052735?crawler=true&mimetype=application/pdf
Smoking	free resource	MedlinePlus Health Information	https://medlineplus.gov/smoking.html
	free resource	PubMed Central	https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/28977763/
	free resource	Europe PubMed Central	https://europepmc.org/abstract/MED/28977763
	free resource	scite Smart Citations	https://scite.ai/reports/28977763