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Figure 1. Effects of different regimens of periodontal therapy on changes in serum CRP (N = 65), IL-6 (N = 65), total cholesterol (N = 65), and LDL cholesterol (N = 65). Boxes refer to the 25th (bottom) and 75th (top) percentiles, and the median is the horizontal line inside; fences refer to the 10th (lower) and 90th (upper) percentiles, respectively. Open circles represent outliers, whereas asterisks stand for extreme observations within the subject number. Positive differences indicate a decrease in concentrations at 2 mos compared with the pre-treatment baseline. The horizontal dashed line indicates the line of no difference between baseline and 2 mos.
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