Name	Info	Provider	Link
	subscription/membership/fee required	Elsevier Science	https://linkinghub.elsevier.com/retrieve/pii/S1934-1482(09)01646-3
	subscription/membership/fee required	Wiley	https://doi.org/10.1016/j.pmrj.2009.12.008
	subscription/membership/fee required	ClinicalKey	https://www.clinicalkey.com/content/playBy/pii?v=S1934-1482(09)01646-3