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Results for unstimulated saliva samples of controls and periodontitis patients; total proteolytic activity (TPA) (a), matrix metalloproteinase‐8 (MMP‐8) concentrations (b), chitinase activity (c), lysozyme activity (d) and albumin concentrations (e). Horizontal lines represent median values for each group. ***p < .001, **p ≤ .01. Presentation of MMP‐8 values in logarithmic scale
