Name	Info	Provider	Link
	free resource	MDPI	https://www.mdpi.com/resolver?pii=nano9040579
	free resource	PubMed Central	https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/30970600/
	free resource	Europe PubMed Central	https://europepmc.org/abstract/MED/30970600
Full text from	free resource	Diposit Digital de la Universitat de Barcelona	http://hdl.handle.net/2445/132326