Name	Info	Provider	Link
	subscription/membership/fee required	Ingenta plc	https://www.ingentaconnect.com/openurl?genre=article&issn=1078-7496&volume=31&issue=4&spage=224&aulast=Lindley
	subscription/membership/fee required	Ovid Technologies, Inc.	http://ovidsp.ovid.com/ovidweb.cgi?T=JS&PAGE=linkout&SEARCH=38990879.ui
	subscription/membership/fee required	Wolters Kluwer	https://doi.org/10.1097/JTN.0000000000000802