The remaining seven cell lines were from patients with syndromal autism: four cases had Fragile X syndrome, autistic features and full methylation at the FRAXA locus; two cases had Rett syndrome and MECP2 mutations; one case had a ZNF711 mutation, X-linked intellectual disability and clinical findings consistent with ASDs (see Additional file 1: Table S1 for more detailed description). Here, FMR1 is linked to autism.