Name	Info	Provider	Link
Vitamin D	free resource	MedlinePlus Health Information	https://medlineplus.gov/vitamind.html
See the articles recommended by the Faculty of more than 8,000 leading experts in Biology and Medicine.	subscription/membership/fee required	H1 Connect	https://facultyopinions.com/pubmed/21555499
	subscription/membership/fee required	Silverchair Information Systems	https://publications.aap.org/pediatrics/article-lookup/doi/10.1542/peds.2010-3054