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Improvement of the serum AST and ALT levels with periodontal treatments in NAFLD patients with periodontitis. Box plots represent the inter-quartile range (boxes), median (central horizontal lines), range (thin lines) and outliers (circles) of the serum AST or ALT levels from 10 cases. Stepwise decreases of the serum AST (P < 0.0001, Kruskal-Wallis test) and ALT (P < 0.0001, Kruskal-Wallis test) were observed during the course of the periodontal treatments.
