Fig. 3From: Identification of key genes and immune infiltration in osteoarthritis through analysis of zinc metabolism-related genesImmune infiltration levels and expression levels of immune checkpoint genes in OA patients and normal patients analyzed by ssGSEA. (A) ssGSEA analysis of immune cells and immune-related functions in OA patients and normal patients. (B) Expression level of immune checkpoint genes in OA patients and normal patients; * indicates P < 0.05; ** indicates P < 0.01; *** indicates P < 0.001Back to article page