Name	Info	Provider	Link
	free resource	HighWire	https://gh.bmj.com/lookup/pmidlookup?view=long&pmid=34785507
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/34785507/
	free resource	Europe PubMed Central	https://europepmc.org/abstract/MED/34785507