Of these, 240 probands have variants occurring in 12 HNRNPs where three or more probands have been identified (termed NDD HNRNPs: HNRNPAB, HNRNPD, HNRNPF, HNRNPH1, HNRNPH2, HNRNPH3, HNRNPK, HNRNPR, SYNCRIP, HNRNPU, HNRNPUL1, and HNRNPUL2). This evidence concerns the gene HNRNPU and Neurodevelopmental delay.