There was no correlation found between IL-10 serum levels with the degree of chronic inflammation or neutrophil infiltration. There was no correlation found between MMP-7 serum levels with the degree of chronic inflammation or neutrophil infiltration. The same results were found for MMP-9 serum levels. There was no correlation found between MMP-9 serum levels with the degree of chronic inflammation or neutrophil infiltration (Table 3).