TNF and infection: The results showed that MIR155HG and TNF-α were positively correlated with the incidence of infection, renal damage and cardiac damage (r=0.623, 0.533 and 0.621.; r=0.431, 0.498 and 0.552) (P<0.05), but had no obvious correlations with the incidence of blood system damage, central nervous system damage and pulmonary damage (P>0.05) (Table 4).