Name	Info	Provider	Link
	subscription/membership/fee required	Elsevier Science	https://linkinghub.elsevier.com/retrieve/pii/S0960-0760(19)30489-3
Vitamin D	free resource	MedlinePlus Health Information	https://medlineplus.gov/vitamind.html
	free resource	PubMed Central	https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/31783150/
	free resource	Europe PubMed Central	https://europepmc.org/abstract/MED/31783150
	free resource	NCI CPTC Antibody Characterization Program	https://antibodies.cancer.gov/detail/CPTC-KRT+Group+B-1
	free resource	NCI CPTAC Assay Portal	https://assays.cancer.gov/non-CPTAC-3893