Name	Info	Provider	Link
	subscription/membership/fee required	Ingenta plc	https://www.ingentaconnect.com/openurl?genre=article&issn=1559-6109&volume=56&issue=4&spage=436&aulast=Williams
Anesthesia	free resource	MedlinePlus Health Information	https://medlineplus.gov/anesthesia.html
	free resource	PubMed Central	https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/28724493/
	free resource	Europe PubMed Central	https://europepmc.org/abstract/MED/28724493