KLRB1 and necrotizing enterocolitis: As shown in Figure 3, there was no significant difference between the frequency of CD3 + CD161 + T cells in total lymphocytes, or the percentage of CD3+ CD161+ CD8αα+, CD3+ CD161+ CD8αβ+, CD3+ CD161+ CD4+, and DN T cells in total CD3+ CD161+ T cells in the intestinal tissues of NEC patients and control subjects.