Name	Info	Provider	Link
	free resource	The Korean Radiological Society	https://www.kjronline.org/DOIx.php?id=10.3348/kjr.2012.13.6.808
	free resource	PubMed Central	https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/23118581/
	free resource	Europe PubMed Central	https://europepmc.org/abstract/MED/23118581