IL9 and hepatocellular carcinoma: There was no significant difference of IL-9 secretion by peripheral non-specific Th9 cells between CHB patients and hepatitis B-related HCC patients (P=0.347, SNK-q test, Figure 6A), or by liver-infiltrating non-specific Th9 cells between non-tumor site and tumor site (P=0.880, SNK-q test, Figure 6A).