Name	Info	Provider	Link
Minerals	free resource	MedlinePlus Health Information	https://medlineplus.gov/minerals.html
	subscription/membership/fee required	Ovid Technologies, Inc.	http://ovidsp.ovid.com/ovidweb.cgi?T=JS&PAGE=linkout&SEARCH=6480631.ui
Cited by Patents in	free resource	The Lens - Patent Citations Database	https://www.lens.org/lens/search/patent/list?q=reference_cited.nlp.ids.pmid:6480631
	subscription/membership/fee required	Wolters Kluwer	https://journals.lww.com/6480631.pmid