Name	Info	Provider	Link
	free resource	Baishideng Publishing Group Inc.	https://www.wjgnet.com/1007-9327/full/v20/i44/16734.htm
Endoscopy	free resource	MedlinePlus Health Information	https://medlineplus.gov/endoscopy.html
	free resource	PubMed Central	https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/25469045/
	free resource	Europe PubMed Central	https://europepmc.org/abstract/MED/25469045
	free resource	scite Smart Citations	https://scite.ai/reports/25469045