Name	Info	Provider	Link
Endoscopy	free resource	MedlinePlus Health Information	https://medlineplus.gov/endoscopy.html
	subscription/membership/fee required	Wiley	https://doi.org/10.1002/nau.23850
Cited by Patents in	free resource	The Lens - Patent Citations	https://www.lens.org/lens/search/patent/list?q=citation_id:30311696