PMM2 and autism: The majority of the identified causal genes was unique and had been previously described in the Simons Foundation Autism Research Initiative (SFARI) database associated with ASD, with the exception of 7 genes (CLTC, FGD1, HIST1H1E, IFIH1, PIGG, PMM2, and SOX11) associated with other disorders in which ASD-like symptoms could also be present.