Name	Info	Provider	Link
	free resource	BioMed Central	https://bmchealthservres.biomedcentral.com/articles/10.1186/s12913-019-3902-y
	free resource	PubMed Central	https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/30674310/
	free resource	Europe PubMed Central	https://europepmc.org/abstract/MED/30674310
Full text from	free resource	Linkoping University Electronic Press	http://liu.diva-portal.org/smash/get/diva2:1282131/FULLTEXT01.pdf