Similar to that linkage study, crmp1 or crmp2 gene polymorphisms and abnormal CRMP1 or CRMP2 protein levels have been found in schizophrenia (Edgar et al., 2000; Johnston-Wilson et al., 2000; Hong et al., 2005; Beasley et al., 2006; Bader et al., 2012). This evidence concerns the gene DPYSL2 and schizophrenia.