Name	Info	Provider	Link
Clinical Trials	free resource	MedlinePlus Health Information	https://medlineplus.gov/clinicaltrials.html
	free resource	PubMed Central	https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/31631321/
	free resource	Europe PubMed Central	https://europepmc.org/abstract/MED/31631321
	subscription/membership/fee required	Wiley	https://onlinelibrary.wiley.com/doi/10.1111/biom.13163
	subscription/membership/fee required	Silverchair Information Systems	https://academic.oup.com/biometrics/article-lookup/doi/10.1111/biom.13163