Name	Info	Provider	Link
	subscription/membership/fee required	Ovid Technologies, Inc.	http://ovidsp.ovid.com/ovidweb.cgi?T=JS&PAGE=linkout&SEARCH=21878762.ui
Full text from	free resource	CORE	https://core.ac.uk/reader/189629536?utm_source=linkout
	subscription/membership/fee required	Wolters Kluwer	https://dx.doi.org/10.1097/HP.0b013e31820dbc53