sentence: Indeed , in contrast to autosomal dominant forms of intellectual disability , for which some few genes are over-represented ( SYNGAP1 , ARID1B , ANKRD11 , SCN1A , and some others [ 1 ] ) , none of the large ARID studies that were performed on over 100 families showed any particularly prevalent gene in ARID [ 3 , 6 , 8, 16 , 17 ] .