CBLN1 and frontotemporal dementia: Similarly, GM3(d18:1_16:0), Cer(d18:1_23:0), and Cer(d18:1_24:1) were positively correlated with disease severity in FTD‐GRN individuals (R = 0.362, p = 0.01; R = 0.45, p = 0.02; and R = 0.38, p = 0.054, respectively) (Figure 6B–D).