FGFR4 and infection: Validation of the gene expression levels obtained by RNA-seq specific to the HCV group (BIRC5 and SLC22A1), the HBV group (CLEC1B), and the group without infection (FGFR4, HSF1, RNF187, HSP90AB1, and HSPB1) was performed using the real-time PCR technique.