Although MRP4 has been reported to be upregulated in MASH (Hardwick et al., 2011), it was below LLOQ in most samples in our study, which is consistent with previous QTAP-based analyses in liver tissue (Vildhede et al., 2020) and SCHH (Fashe et al., 2022). This evidence concerns the gene ABCC4 and metabolic dysfunction-associated steatohepatitis.