Name	Info	Provider	Link
	free resource	PubMed Central	https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/31508357/
	free resource	Europe PubMed Central	https://europepmc.org/abstract/MED/31508357
	free resource	Korean Association of Oral and Maxillofacial Surgeons	http://www.jkaoms.org/journal/view.html?volume=45&number=4&page=230