KRT18 and fibrosis: The CK18 of patients in F0, F1, F2, F3 and F4 fibrosis group was 76.6 ± 10.9 (ng/L), 87.1 ± 9.7 (ng/L), 103.0 ± 13.3 (ng/L), 101.8 ± 18.4 (ng/L) and 111.3 ± 32.2 (ng/L), respectively.