NDUFB6 and multiple system atrophy: Compared with the HC group, the right CA2/3 volume was significantly lower in the MSA-CI group (215.6 ± 30.1 vs. 209.8 ± 32.5, P=0.029) whereas that of the left fimbria was significantly higher in the MSA-CP group (64.6 ± 20.1 vs. 83.0 ± 27.1, P=0.046) (Table 2 and Figure 2).