We also examined neurons for the presence of truncated STMN2 and UNC13A cryptic exon mRNA, which are implicated as ALS–FTLD biomarkers and/or risk genes (Brown et al., 2022; Prudencio et al., 2020; Melamed et al., 2019; Ma et al., 2022). Here, STMN2 is linked to amyotrophic lateral sclerosis.