As was observed for the paired group, c-Fos was largely expressed in uninfected cells, regardless of which the virus was infused into the hemisphere (Figure 2f), and no paracrine effects of GH overexpression were observed in the sections lacking infection (Figure 2g; main effect of viral infusion: F(1,19)=0.87, P=0.37; main effect of region: F(1,19)=1.72, P=0.21; viral infusion × region interaction, F(1,19)=0.63, P=0.44). The gene discussed is GH1; the disease is infection.