Name	Info	Provider	Link
	subscription/membership/fee required	Ingenta plc	https://www.ingentaconnect.com/openurl?genre=article&issn=2049-9450&volume=3&issue=6&spage=1248&aulast=Gravis
	subscription/membership/fee required	Ovid Technologies, Inc.	http://ovidsp.ovid.com/ovidweb.cgi?T=JS&PAGE=linkout&SEARCH=26807228.ui
	free resource	PubMed Central	https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/26807228/
	free resource	Europe PubMed Central	https://europepmc.org/abstract/MED/26807228
	free resource	scite Smart Citations	https://scite.ai/reports/26807228