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Tissue or blood expressions of ANRIL or MALAT1 were not correlated with age of either patients or controls. There were significant correlations between expression levels of ANRIL and MALAT1 in gingival tissues both in cases (r = 0.62, P less then 0.0001) and in controls (r = 0.37, P less then 0.0001). However, blood levels of these lncRNAs were not correlated with each other either in cases or in controls. Most notably, there was no significant correlation between expression levels of these lncRNAs in gingival tissues and in the blood of