Name	Info	Provider	Link
	free resource	Elsevier Science	https://linkinghub.elsevier.com/retrieve/pii/S2095-2546(17)30085-6
	free resource	PubMed Central	https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/30719380/
Full Text at the institutional repository	free resource	Andalusian Health Repository	http://hdl.handle.net/10668/13515
	free resource	Europe PubMed Central	https://europepmc.org/abstract/MED/30719380