IFNG and choroideremia: Besides, the downward trend of serum IFN-γ could be seen in the CHM group, and the differences between days 0 and 56 were larger in the CHM group (42.72 and 29.56 pg/mL, respectively) than in the control group (39.65 and 41.85 pg/mL, respectively; trend analysis, p = 0.013).