HNRNPH2 and intervertebral disk degenerative disorder: Patient 3 had ASD, severe IDD, epilepsy, and dysmorphic features and a de novo HNRNPH2 variant (NM_019597:c.422T>A:p.(Met141Lys]) (intellectual developmental disorder, X‐linked syndromic, Bain type, MIM: 300986).74, 75