As FTD is clinically heterogeneous, we limited that group to include only individuals with the pathological diagnosis of frontotemporal lobar degeneration with TDP‐43 inclusions (FTLD‐TDP), which accounts for the majority of overlap with ALS and FTD (Neumann et al, 2009). The gene discussed is TARDBP; the disease is amyotrophic lateral sclerosis.