MAPT and behavioral variant of frontotemporal dementia: There was a trend towards patients with bvFTD due to C9ORF72 having globally higher 11C-PK-11195 binding than those with no genetic diagnosis, while those with abnormalities of MAPT had intermediate binding [main effect of gene F(2,3) = 8.26, P = 0.060; Tukey’s HSD P = 0.049 for C9ORF72 (mean = 0.176, ±0.017) versus no genetic diagnosis (mean = 0.094, ±0.016), but non-significant for either group versus MAPT (mean = 0.123, ±0.018)].