Name	Info	Provider	Link
	subscription/membership/fee required	HighWire	https://doi.org/10.1891/0886-6708.23.6.758
	subscription/membership/fee required	Ingenta plc	https://www.ingentaconnect.com/openurl?genre=article&issn=0886-6708&volume=23&issue=6&spage=758&aulast=Roberts
	subscription/membership/fee required	Ovid Technologies, Inc.	http://ovidsp.ovid.com/ovidweb.cgi?T=JS&PAGE=linkout&SEARCH=19069566.ui