Further complicating matters, the C9 expansion has been associated with scarce disease incidence in a wide spectrum of neurodegenerative and psychiatric conditions, including Huntington’s Disease, Parkinson’s Disease, and Schizophrenia (Hensman Moss et al., 2014; Lesage et al., 2013; McLaughlin et al., 2017). This evidence concerns the gene C9 and schizophrenia.