Name	Info	Provider	Link
	subscription/membership/fee required	Elsevier Science	https://linkinghub.elsevier.com/retrieve/pii/S0033-3506(12)00039-X
HIV	free resource	MedlinePlus Health Information	https://medlineplus.gov/hiv.html
	free resource	PubMed Central	https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/22559946/
	free resource	Europe PubMed Central	https://europepmc.org/abstract/MED/22559946
	subscription/membership/fee required	ClinicalKey	https://www.clinicalkey.com/content/playBy/pii?v=S0033-3506(12)00039-X