CREBBP and autism: Furthermore, Autism and schizophrenia and Autism and ADHD (the two top neuropsychiatric disorders sharing the highest percentages of genes with the genes linked to SFARI-Autism) shared the CREP-Binding Protein (CREBBP), among the top 10 genes expressed maximally across the 54 tissues and common to the Autism and Schizophrenia gene pool.