Name	Info	Provider	Link
	subscription/membership/fee required	Elsevier Science	https://linkinghub.elsevier.com/retrieve/pii/S0021-9797(11)00110-X
	free resource	PubMed Central	https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/21392778/
	free resource	Europe PubMed Central	https://europepmc.org/abstract/MED/21392778
Cited by Patents in	free resource	The Lens - Patent Citations	https://www.lens.org/lens/search/patent/list?q=citation_id:21392778