CLEC5A and rheumatoid arthritis: There were higher expression levels of MDL-1 and DAS12 protein in synovial membranes from active RA patients (median 17.70, IQR 15.80–20.10 and 15.80, IQR 13.70–17.80; respectively) compared to levels in SMs from inactive RA patients (12.30, IQR 11.40–14.18, p<0.05 and 12.55, IQR 12.10–13.98, p<0.05; respectively) or from OA patients (10.25, IQR 7.53–11.48, p<0.005 and 7.75, IQR 6.20–10.33, p<0.001; respectively).