Name	Info	Provider	Link
	free resource	Elsevier Science	https://linkinghub.elsevier.com/retrieve/pii/S0954-6111(21)00349-8
COPD	free resource	MedlinePlus Health Information	https://medlineplus.gov/copd.html
	subscription/membership/fee required	ClinicalKey	https://www.clinicalkey.com/content/playBy/pii?v=S0954-6111(21)00349-8