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The soluble biomarker calprotectin (a S100 protein) is associated to ultrasonographic synovitis scores and is sensitive to change in patients with rheumatoid arthritis treated with adalimumab

Hilde Berner Hammer*, Magne K Fagerhol, Tale Norbye Wien and Tore K Kvien

Arthritis Research & Therapy 2011, 13:R178  doi:10.1186/ar3503

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