Name	Info	Provider	Link
	subscription/membership/fee required	Elsevier Science	https://linkinghub.elsevier.com/retrieve/pii/S2590-0412(19)30011-X
Full text from	free resource	HAL archives ouvertes	https://hal.archives-ouvertes.fr/hal-02178946
COPD	free resource	MedlinePlus Health Information	https://medlineplus.gov/copd.html