Name	Info	Provider	Link
Clinical Trials	free resource	MedlinePlus Health Information	https://medlineplus.gov/clinicaltrials.html
	subscription/membership/fee required	Ovid Technologies, Inc.	http://ovidsp.ovid.com/ovidweb.cgi?T=JS&PAGE=linkout&SEARCH=9926101.ui
	subscription/membership/fee required	Cambridge University Press	https://www.cambridge.org/core/product/identifier/S0007125000261163/type/journal_article
Cited by Patents in	free resource	The Lens - Patent Citations Database	https://www.lens.org/lens/search/patent/list?q=reference_cited.nlp.ids.pmid:9926101