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(b)
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Figure 2: (a) The frequencies of CD4+/PD-1+ cells in stage I and II endometriosis patients, stage III and IV endometriosis patients, and healthy volunteers. (b) The frequencies of CD8+/PD-1+ cells in stage I and II endometriosis patients, stage III and IV endometriosis patients, and healthy volunteers. (c) The frequencies of CD19+/PD-1+ cells in stage I and II endometriosis patients, stage III and IV endometriosis patients, and healthy volunteers. (d) The frequencies of CD4+/PD-L1+ cells in stage I and II endometriosis patients, stage III and IV endometriosis patients, and healthy volunteers. (e) The frequencies of CD8+/PD-L1+ cells in stage I and II endometriosis patients, stage III and IV endometriosis patients, and healthy volunteers. (f) The frequencies of CD19+/PD-L1+ cells in stage I and II endometriosis patients, stage III and IV endometriosis patients, and healthy volunteers.