Scatter plots of plasma AFP, AAG, and DCP. Scatter plots of plasma (A) AFP, (B) AAG, and (C) DCP levels in control, AFP-low HCC, and AFP-high HCC. The black line indicates the median, for which the value is indicated on the bottom of the scatter plot. The dashed line indicates the cut-off value of each marker, 20 ng/mL for AFP, 800 μg/mL for AAG, and 4.5 ng/mL for DCP. In all markers, P < 0.0001 for control vs. either AFP-low HCC or AFP-high HCC.