Name	Info	Provider	Link
	free resource	International Scientific Literature, Ltd.	https://www.medscimonit.com/download/index/idArt/920598
Pain	free resource	MedlinePlus Health Information	https://medlineplus.gov/pain.html
	free resource	PubMed Central	https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/32225127/
	free resource	Europe PubMed Central	https://europepmc.org/abstract/MED/32225127