Name	Info	Provider	Link
	subscription/membership/fee required	Ovid Technologies, Inc.	http://ovidsp.ovid.com/ovidweb.cgi?T=JS&PAGE=linkout&SEARCH=18808727.ui
	subscription/membership/fee required	Cambridge University Press	https://www.cambridge.org/core/product/identifier/S0950268808001349/type/journal_article