Name	Info	Provider	Link
	free resource	PubMed Central	https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/29333120/
	free resource	Europe PubMed Central	https://europepmc.org/abstract/MED/29333120
Full text from	free resource	Diposit Digital de la Universitat de Barcelona	http://hdl.handle.net/2445/124229
	free resource	De Gruyter	https://sciendo.com/article/10.1515/raon-2017-0051
	free resource	scite Smart Citations	https://scite.ai/reports/29333120