Name	Info	Provider	Link
	subscription/membership/fee required	Elsevier Science	https://linkinghub.elsevier.com/retrieve/pii/S0749-0704(06)00017-0
Critical Care	free resource	MedlinePlus Health Information	https://medlineplus.gov/criticalcare.html
	free resource	PubMed Central	https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/16893734/
	free resource	Europe PubMed Central	https://europepmc.org/abstract/MED/16893734
	subscription/membership/fee required	W.B. Saunders	http://journals.elsevierhealth.com/retrieve/pii/S0749-0704(06)00017-0