GAPDH and ACTB expression profiles determined by RT-PCR were highly similar (Figure 3), and higher GAPDH expression in sepsis compared to SIRS was confirmed by QGP in this study (Figure 5B) and previously in sepsis compared to age- and sex-matched outpatients by Cummings et al. (2014) [49]. Here, GAPDH is linked to systemic inflammatory response syndrome.