an increasing trendP < 0.05
Compared with that in the control group, the proliferative activity of lymphocytes in the NKP-1339 group showed an increasing trend, whereas the cell proliferation index in the NKP-1339-NBs+US group was higher than that in the NKP-1339+US and N-NBs+US groups ( P < 0.05, Fig. 5 A and B).