Fig. 2From: Evaluation of zinc sulfate mucoadhesive formulation on recurrent aphthous stomatitis: a randomized double-blind, placebo-controlled clinical trialComparing the mean diameter of the lesions between the two groups during the study. The Chi-square test (ns; not significant, * P ≤ 0.05, ** P ≤ 0.01, *** P ≤ 0.001)Back to article page