Figure 3.

Immunohistochemical staining for macrophages. Tissue sections (x200 magnification) of (A) arthritic and (B) contralateral knees with anti-rat CD68 (ED1) staining (brown staining) for synovial macrophages. Arrows indicate examples of ED1 positive macrophages.

Gent et al. Arthritis Research & Therapy 2013 15:R37   doi:10.1186/ar4191
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