Name	Info	Provider	Link
Full text from AIR - Univ. Milan	free resource	Archivio Istituzionale della Ricerca Unimi	https://air.unimi.it/handle/2434/1027910
	subscription/membership/fee required	HighWire	https://ijgc.bmj.com/lookup/pmidlookup?view=long&pmid=33608453
	subscription/membership/fee required	Ovid Technologies, Inc.	http://ovidsp.ovid.com/ovidweb.cgi?T=JS&PAGE=linkout&SEARCH=33608453.ui
	free resource	PubMed Central	https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/33608453/
	free resource	Europe PubMed Central	https://europepmc.org/abstract/MED/33608453
	free resource	scite Smart Citations	https://scite.ai/reports/33608453