Figure 4: Distribution of serum AMPAR and NR2 antibodies respectively in A, C: (1) all enrolled athletes (n=84); (2) subjects returned for longitudal study (n=18). Dynamic changes of AMPAR and NR2 antibodies levels in serumof subjects (B, D correspondently). Dotted lines show corresponding cut offs: 1.5 ng/mL for AMPAR antibodies and 2.0 ng/mL for NR2 antibodies.