Name	Info	Provider	Link
	free resource	HighWire	https://bmjopen.bmj.com/lookup/pmidlookup?view=long&pmid=30904842
	free resource	PubMed Central	https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/30904842/
Full Text at the institutional repository	free resource	Andalusian Health Repository	http://hdl.handle.net/10668/13754
	free resource	Europe PubMed Central	https://europepmc.org/abstract/MED/30904842