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Median levels of salivary MMPs in healthy controls (Control salivary samples; n = 16), patients treated with anti-TNF (Anti-TNF treated patient salivary samples; n = 14) and untreated patients (Untreated patient salivary samples; n = 21). The data is presented as percentage out of MMP9 levels in the control group. The significance values (**P < 0.01) were calculated for each group in comparison to its respective control.
