Name	Info	Provider	Link
	subscription/membership/fee required	Elsevier Science	https://linkinghub.elsevier.com/retrieve/pii/S2050-0521(18)30111-2
	subscription/membership/fee required	Ovid Technologies, Inc.	http://ovidsp.ovid.com/ovidweb.cgi?T=JS&PAGE=linkout&SEARCH=30503796.ui
	subscription/membership/fee required	Silverchair Information Systems	https://academic.oup.com/smr/article-lookup/doi/10.1016/j.sxmr.2018.09.007