Name	Info	Provider	Link
	subscription/membership/fee required	Ovid Technologies, Inc.	http://ovidsp.ovid.com/ovidweb.cgi?T=JS&PAGE=linkout&SEARCH=30320891.ui
	subscription/membership/fee required	Wiley	https://doi.org/10.1111/jmi.12761
	free resource	Spiral, Imperial College Digital Repository	http://hdl.handle.net/10044/1/65161