Name	Info	Provider	Link
	free resource	PubMed Central	https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/22010065/
	free resource	Europe PubMed Central	https://europepmc.org/abstract/MED/22010065
	free resource	Korean Academy of Oral and Maxillofacial Radiology	https://isdent.org/DOIx.php?id=10.5624/isd.2011.41.3.95