DAP3 and Perrault syndrome: WES initially uncovered no putative pathogenic variants in known Perrault syndrome genes, but additional filtering revealed the F1 proband was compound heterozygous for the missense variant DAP3 (c.1184G>A [GenBank: NM_004632.4] [p.Cys395Tyr]), in trans to a 135 kb deletion identified with multiplex-ligation-dependent probe amplification (MPLA).