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/27012320/
	free resource	Europe PubMed Central	https://europepmc.org/abstract/MED/27012320
	subscription/membership/fee required	Wiley	https://doi.org/10.1002/14651858.CD005944.pub3
	free resource	scite Smart Citations	https://scite.ai/reports/27012320