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Correlation between the percentage of CD4+ T cells expressing CTLA-4 (CD4+CTLA-4+) and: (a) the number of monocytes; (b) the percentage of NK cells (CD3-CD16+CD56+); (c) the percentage of NKT-like cells (CD3+CD16+CD56+) in patients with endometriosis and coexisting infertility (n = 27).
