Name	Info	Provider	Link
	free resource	Elsevier Science	https://linkinghub.elsevier.com/retrieve/pii/S0007-0912(17)34167-3
Pain Relievers	free resource	MedlinePlus Health Information	https://medlineplus.gov/painrelievers.html
	subscription/membership/fee required	Ovid Technologies, Inc.	http://ovidsp.ovid.com/ovidweb.cgi?T=JS&PAGE=linkout&SEARCH=18628265.ui