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		International Journal of Oral Biology :: Vol.44 No.4 pp.160-164 DOI:https://doi.org/10.11620/IJOB.2019.44.4.160 Open abstract    
International Journal of Oral Biology :: Vol.44 No.4 pp.160-164
			DOI:https://doi.org/10.11620/IJOB.2019.44.4.160
			 
			