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/30073448/
	subscription/membership/fee required	Springer	https://doi.org/10.1007/s10654-018-0428-2
	free resource	Europe PubMed Central	https://europepmc.org/abstract/MED/30073448
	free resource	scite Smart Citations	https://scite.ai/reports/30073448