Name	Info	Provider	Link
	subscription/membership/fee required	Elsevier Science	https://linkinghub.elsevier.com/retrieve/pii/S0090-4295(11)02260-6
	subscription/membership/fee required	ClinicalKey	https://www.clinicalkey.com/content/playBy?issn=&vol=78&issue=6&pgfirst=1397