Name	Info	Provider	Link
Iron	free resource	MedlinePlus Health Information	https://medlineplus.gov/iron.html
	subscription/membership/fee required	Springer	https://doi.org/10.1007/s10856-010-4225-z
Cited by Patents in	free resource	The Lens - Patent Citations	https://www.lens.org/lens/search/patent/list?q=citation_id:21221727