Name	Info	Provider	Link
	subscription/membership/fee required	Atypon	https://www.ajronline.org/doi/10.2214/AJR.09.2611
Colonoscopy	free resource	MedlinePlus Health Information	https://medlineplus.gov/colonoscopy.html
	free resource	PubMed Central	https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/19843745/
	free resource	Europe PubMed Central	https://europepmc.org/abstract/MED/19843745
Cited by Patents in	free resource	The Lens - Patent Citations	https://www.lens.org/lens/search/patent/list?q=citation_id:19843745