Name	Info	Provider	Link
	free resource	PubMed Central	https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/19668432/
	free resource	Europe PubMed Central	https://europepmc.org/abstract/MED/19668432
Full text from	free resource	Diposit Digital de la Universitat de Barcelona	http://hdl.handle.net/2445/173625
	free resource	Dove Medical Press	https://dx.doi.org/10.2147/opth.s3798
Cited by Patents in	free resource	The Lens - Patent Citations	https://www.lens.org/lens/search/patent/list?q=citation_id:19668432