Name	Info	Provider	Link
	subscription/membership/fee required	Ingenta plc	https://www.ingentaconnect.com/openurl?genre=article&issn=1559-6109&volume=61&issue=3&spage=248&aulast=Qiao
Ozone	free resource	MedlinePlus Health Information	https://medlineplus.gov/ozone.html
	free resource	PubMed Central	https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/35393007/
	free resource	Europe PubMed Central	https://europepmc.org/abstract/MED/35393007