CNBP and amyotrophic lateral sclerosis: Intron retention is more broadly recognized as a feature of CG-rich intronic expansions, as is the case for C9orf72-associated ALS (Niblock et al., 2016) and CCHC-Type Zinc Finger Nucleic Acid Binding Protein (CNBP)-associated DM2 (Raheem et al., 2010; Sznajder et al., 2018).