Name	Info	Provider	Link
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/33247691/
	free resource	Europe PubMed Central	https://europepmc.org/abstract/MED/33247691
	free resource	Asian Pacific Organization for Cancer Prevention	http://journal.waocp.org/?sid=Entrez:PubMed&id=pmid:33247691&key=2020.21.11.3325