Name	Info	Provider	Link
	subscription/membership/fee required	Elsevier Science	https://linkinghub.elsevier.com/retrieve/pii/S1743-6095(15)33950-3
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=22321450.ui
	free resource	PubMed Central	https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/22321450/
	free resource	Europe PubMed Central	https://europepmc.org/abstract/MED/22321450
	subscription/membership/fee required	Wiley	https://onlinelibrary.wiley.com/resolve/openurl?genre=article&sid=nlm:pubmed&issn=1743-6095&date=2012&volume=9&issue=4&spage=1106
Drug Use and Addiction	free resource	MedlinePlus Consumer Health Information	https://medlineplus.gov/druguseandaddiction.html
	subscription/membership/fee required	Silverchair Information Systems	https://academic.oup.com/jsm/article-lookup/doi/10.1111/j.1743-6109.2011.02648.x