Similarly, retinal IBA1+ microgliosis differentiated between individuals with high and low cerebral tauopathy (1.7-fold higher in TH vs. TL cases; P < 0.05) but did not distinguish between combined brain ATNH and ATNL cases or cases with high versus low cerebral amyloid or atrophy, separately (Fig. 4n and Suppl. Here, AIF1 is linked to Atrophy.