Name	Info	Provider	Link
	subscription/membership/fee required	Elsevier Science	https://linkinghub.elsevier.com/retrieve/pii/S0738-3991(09)00142-6
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=S0738-3991(09)00142-6