Name	Info	Provider	Link
	free resource	Elsevier Science	https://linkinghub.elsevier.com/retrieve/pii/S0022-3166(23)00641-7
Vitamin A	free resource	MedlinePlus Health Information	https://medlineplus.gov/vitamina.html
	free resource	PubMed Central	https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/27281810/
	free resource	Europe PubMed Central	https://europepmc.org/abstract/MED/27281810
	free resource	NCI CPTAC Assay Portal	https://assays.cancer.gov/non-CPTAC-3321
	free resource	scite Smart Citations	https://scite.ai/reports/27281810
	subscription/membership/fee required	Silverchair Information Systems	https://academic.oup.com/jn/article-lookup/doi/10.3945/jn.116.230300