Name	Info	Provider	Link
	subscription/membership/fee required	American Chemical Society	https://doi.org/10.1021/acs.molpharmaceut.8b01197
Pain	free resource	MedlinePlus Health Information	https://medlineplus.gov/pain.html
	free resource	PubMed Central	https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/30702897/
	free resource	Europe PubMed Central	https://europepmc.org/abstract/MED/30702897