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/26414982/
	free resource	Europe PubMed Central	https://europepmc.org/abstract/MED/26414982
	free resource	American Academy of Sleep Medicine	https://doi.org/10.5664/jcsm.5294
	free resource	scite Smart Citations	https://scite.ai/reports/26414982