Name	Info	Provider	Link
	subscription/membership/fee required	Ingenta plc	https://www.ingentaconnect.com/openurl?genre=article&issn=1932-0620&volume=16&issue=1&spage=33&aulast=Ehlers
Drug Use and Addiction	free resource	MedlinePlus Health Information	https://medlineplus.gov/druguseandaddiction.html
	subscription/membership/fee required	Ovid Technologies, Inc.	http://ovidsp.ovid.com/ovidweb.cgi?T=JS&PAGE=linkout&SEARCH=34411038.ui
	free resource	PubMed Central	https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/34411038/
	free resource	Europe PubMed Central	https://europepmc.org/abstract/MED/34411038
Drug Use and Addiction	free resource	MedlinePlus Consumer Health Information	https://medlineplus.gov/druguseandaddiction.html
	subscription/membership/fee required	Wolters Kluwer	https://doi.org/10.1097/ADM.0000000000000815