Name	Info	Provider	Link
Free full text from BORIS	free resource	Bern Open Repository and Information System	https://boris.unibe.ch/id/eprint/155037
	free resource	HighWire	http://www.bmj.com/lookup/pmidlookup?view=long&pmid=33762259
Air Pollution	free resource	MedlinePlus Health Information	https://medlineplus.gov/airpollution.html
	subscription/membership/fee required	Ovid Technologies, Inc.	http://ovidsp.ovid.com/ovidweb.cgi?T=JS&PAGE=linkout&SEARCH=33762259.ui
	free resource	PubMed Central	https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/33762259/
	free resource	Europe PubMed Central	https://europepmc.org/abstract/MED/33762259
	free resource	scite Smart Citations	https://scite.ai/reports/33762259