Figure 1.

DAS28 scores and CRP levels in patients with rheumatoid arthritis and no (a), moderate (b), or severe (c) periodontitis. **P < 0.01. CRP, C-reactive protein; DAS28, disease activity score 28 tender and swollen joint count.

Smit et al. Arthritis Research & Therapy 2012 14:R222   doi:10.1186/ar4061
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