Name	Info	Provider	Link
	subscription/membership/fee required	Atypon	https://www.magonlinelibrary.com/doi/10.12968/bjon.1994.3.21.1129?url_ver=Z39.88-2003&rfr_id=ori:rid:crossref.org&rfr_dat=cr_pub 0pubmed
Peptic Ulcer	free resource	MedlinePlus Health Information	https://medlineplus.gov/pepticulcer.html