FABP4 and metabolic dysfunction-associated steatohepatitis: When FABP4 and MMP9 mRNA expression levels were plotted on the same graph with thresholds defined by the median value of each group or by a CART analysis, 4 NAFL patients and 6 NASH patients expressed high FABP4 and/or MMP9 mRNA levels (Supplementary Fig. S7E).