Name	Info	Provider	Link
	free resource	Ediciones Doyma, S.L.	http://www.elsevier.es/en/linksolver/ft/pii/S0033-8338(10)00051-2
	subscription/membership/fee required	Elsevier Science	https://linkinghub.elsevier.com/retrieve/pii/S0033-8338(10)00051-2
Back Pain	free resource	MedlinePlus Health Information	https://medlineplus.gov/backpain.html