Name	Info	Provider	Link
	free resource	HighWire	https://bmjopen.bmj.com/lookup/pmidlookup?view=long&pmid=22021731
	free resource	PubMed Central	https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/22021731/
	free resource	Europe PubMed Central	https://europepmc.org/abstract/MED/22021731
Cited by Patents in	free resource	The Lens - Patent Citations	https://www.lens.org/lens/search/patent/list?q=citation_id:22021731