Name	Info	Provider	Link
	free resource	Elsevier Science	https://linkinghub.elsevier.com/retrieve/pii/S1526-5900(06)00508-6
Pain	free resource	MedlinePlus Health Information	https://medlineplus.gov/pain.html
Cited by Patents in	free resource	The Lens - Patent Citations	https://www.lens.org/lens/search/patent/list?q=citation_id:16632328