FUT4 and infection: The proportion of PMN-MDSCs (CD11b+HLA−DR−CD14−CD15+), CD15+LOX-1+, and M-MDSCs (CD11b+HLA−DR−CD14+CD15−) in peripheral blood of premature was not significantly different between infants without BPD and infection (8-14d after birth, GA <34w) and premature infants with BPD (P > 0.05) (Figure 1(d)).