Subsequently, we performed an extensive analysis of AT8 levels (mapping tau phosphorylation at Ser202 or Thr205; Figure 1b; Figure S1b–d, Supporting Information) and the brain ptau181/tau ratio (Figure 1c; Figure S1e–g, Supporting Information) across the brain regions described above, comparing “clinical dementia” and “non‐demented” cohorts in TBI and pathology groups. The gene discussed is MAPT; the disease is dementia.