Name	Info	Provider	Link
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/31922371/
	free resource	Europe PubMed Central	https://europepmc.org/abstract/MED/31922371
	free resource	Centers for Disease Control and Prevention	https://www.cdc.gov/pcd/issues/2020/19_0307.htm