Elevated levels of interleukin-1β, interleukin-6, tumor necrosis factor-α and vascular endothelial growth factor in patients with knee articular cartilage injury

Figure 1 Levels of interleukin-1β, interleukin-6, tumor necrosis factor-α and vascular endothelial growth factor in patient and control groups. ^aP < 0.05, vs control group. IL-1β: Interleukin-1β; TNF-α: Tumor necrosis factor-α; VEGF: Vascular endothelial growth factor.