HLA-Bw4 was more frequent in the PSP and PSP-VC groups (p = 0.008 and p = 0.002 compared to PP, Fig 1G), and HLA-A expression was also lower among PSP-VC than PP and PSP-PP (p = 0.05 and p = 0.07, Fig 1H). Here, HLA-A is linked to supranuclear palsy, progressive, 1.