IFNG and amyotrophic lateral sclerosis: Compared with the CSF IFN-γ levels (172.22±17.58 pg/ml) or serum IFN-γ levels (136.42±14.79 pg/ml) of the non-ALS patients respectively, both CSF IFN-γ levels (273.92±24.50 pg/ml and 385.21±16.34 pg/ml, respectively) or serum IFN-γ levels (262.82±30.91 pg/ml and 289.34±17.48 pg/ml, respectively) of ALS<12 m and ALS≥12 m subgroups were significantly increased (P<0.01).