CCL2 and rheumatoid arthritis: No differences were detected in these cytokines between RA+ T−CUS versus RAnoT−CUS patients (IL-6: 77.6 pg/ml [IQR 39.4-379.9] vs. 96.2 [26.9-366.1], p = 0.931; TNF: 746.3 [444.2-2171.7] vs. 640.2 [82.9-1645.8], p = 0.666; MCP-1: 68.6 [14.9-172.8] vs. 100.5 [57.7-380.4], p = 0.235; IFNγ: 426.2 [279.1-1636.9] vs. 706.6 [66.1–1579.0], p = 0.931) (Fig. 2).