Name	Info	Provider	Link
	subscription/membership/fee required	Elsevier Science	https://linkinghub.elsevier.com/retrieve/pii/S0016-5085(09)00180-2
Esophageal Cancer	free resource	MedlinePlus Health Information	https://medlineplus.gov/esophagealcancer.html
	free resource	PubMed Central	https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/19422085/
	free resource	Europe PubMed Central	https://europepmc.org/abstract/MED/19422085
Cited by Patents in	free resource	The Lens - Patent Citations	https://www.lens.org/lens/search/patent/list?q=citation_id:19422085