Name	Info	Provider	Link
	subscription/membership/fee required	Elsevier Science	https://linkinghub.elsevier.com/retrieve/pii/S0140-6736(14)62450-8
	free resource	PubMed Central	https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/25706840/
	free resource	Europe PubMed Central	https://europepmc.org/abstract/MED/25706840
	subscription/membership/fee required	ClinicalKey	https://www.clinicalkey.com/content/playBy/pii?v=S0140-6736(14)62450-8