Name	Info	Provider	Link
	subscription/membership/fee required	Ovid Technologies, Inc.	http://ovidsp.ovid.com/ovidweb.cgi?T=JS&PAGE=linkout&SEARCH=9134724.ui
	free resource	Wiley	https://onlinelibrary.wiley.com/resolve/openurl?genre=article&sid=nlm:pubmed&issn=1364-5072&date=1997&volume=82&issue=4&spage=507
	subscription/membership/fee required	Silverchair Information Systems	https://academic.oup.com/jambio/article-lookup/doi/10.1046/j.1365-2672.1997.00143.x