Name	Info	Provider	Link
	subscription/membership/fee required	Elsevier Science	https://linkinghub.elsevier.com/retrieve/pii/S0740-5472(07)00295-4
Choosing a Doctor or Health Care Service	free resource	MedlinePlus Health Information	https://medlineplus.gov/choosingadoctororhealthcareservice.html
	subscription/membership/fee required	ClinicalKey	https://www.clinicalkey.com/content/playBy/pii?v=S0740-5472(07)00295-4