Name	Info	Provider	Link
Vitamin D	free resource	MedlinePlus Health Information	https://medlineplus.gov/vitamind.html
Full text from	free resource	CORE	https://core.ac.uk/reader/190970730?utm_source=linkout
Cited by Patents in	free resource	The Lens - Patent Citations	https://www.lens.org/lens/search/patent/list?q=citation_id:17047087
	subscription/membership/fee required	Silverchair Information Systems	https://aacrjournals.org/cancerres/article-lookup/doi/10.1158/0008-5472.CAN-06-1876