Name	Info	Provider	Link
	subscription/membership/fee required	Elsevier Science	https://linkinghub.elsevier.com/retrieve/pii/S0891-5849(07)00654-5
	subscription/membership/fee required	Ovid Technologies, Inc.	http://ovidsp.ovid.com/ovidweb.cgi?T=JS&PAGE=linkout&SEARCH=17967428.ui
	free resource	Strathprints - the University of Strathclyde	https://strathprints.strath.ac.uk/7574/