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Figure 1: (a) Sample analysis of the expression of PD-1+ on CD4+ T, CD8+ T, and CD19+ B lymphocytes in a healthy individual. (b) Sample analysis of the expression of PD-1+ in CD4+ T, CD8+ T, and CD19+ B lymphocytes in a stage I endometriosis patient. (c) Sample analysis of the expression of PD-1+ in CD4+ T, CD8+ T, and CD19+ B lymphocytes in a stage IV endometriosis patient. (d) Sample analysis of the expression of PD-L1+ in CD4+ T, CD8+ T, and CD19+ B lymphocytes in a healthy individual. (e) Sample analysis of the expression of PD-L1+ in CD4+ T, CD8+ T, and CD19+ B lymphocytes in a stage I endometriosis patient. (f) Sample analysis of the expression of PD-L1+ in CD4+ T, CD8+ T, and CD19+ B lymphocytes in a stage IV endometriosis patient.