This list also contains the FOXP1 (Lozano et al., 2015) and FOXP2 (Lai et al., 2003) genes, which are required for development of speech and language in humans and interact with CNTNAP2 (Ji et al., 2013), a member of the 47-gene list which is in the neurexin family of genes having known association with schizophrenia. This evidence concerns the gene FOXP2 and schizophrenia.