Name	Info	Provider	Link
Vitamin D Deficiency	free resource	MedlinePlus Health Information	https://medlineplus.gov/vitaminddeficiency.html
	subscription/membership/fee required	Ovid Technologies, Inc.	http://ovidsp.ovid.com/ovidweb.cgi?T=JS&PAGE=linkout&SEARCH=18499714.ui
	free resource	PubMed Central	https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/18499714/
	free resource	Europe PubMed Central	https://europepmc.org/abstract/MED/18499714
	free resource	NCI CPTAC Assay Portal	https://assays.cancer.gov/CPTAC-1595
	subscription/membership/fee required	Silverchair Information Systems	https://academic.oup.com/rheumatology/article-lookup/doi/10.1093/rheumatology/ken203