Name	Info	Provider	Link
	subscription/membership/fee required	Elsevier Science	https://linkinghub.elsevier.com/retrieve/pii/S1743-6095(15)32054-3
Erectile Dysfunction	free resource	MedlinePlus Health Information	https://medlineplus.gov/erectiledysfunction.html
	subscription/membership/fee required	Ovid Technologies, Inc.	http://ovidsp.ovid.com/ovidweb.cgi?T=JS&PAGE=linkout&SEARCH=18355170.ui
	subscription/membership/fee required	Wiley	https://onlinelibrary.wiley.com/resolve/openurl?genre=article&sid=nlm:pubmed&issn=&date=2008&volume=5&issue=6&spage=1345
	free resource	NCI CPTAC Assay Portal	https://assays.cancer.gov/non-CPTAC-2677
Cited by Patents in	free resource	The Lens - Patent Citations	https://www.lens.org/lens/search/patent/list?q=citation_id:18355170
	subscription/membership/fee required	Silverchair Information Systems	https://academic.oup.com/jsm/article-lookup/doi/10.1111/j.1743-6109.2008.00817.x