NCAM1 and endometriosis: Additionally, in patients with pelvic pain syndrome and endometriosis, there was a positive correlation between CD19+PD-L1 B cells and the percentage of CD3-CD16+CD56+ NK cells, and a positive correlation between the percentage of CD8+PD-L1 T cells and the percentage of CD4+CD25+highFoxp3+ regulatory T cells.