_:vb50939452 . _:vb50939452 . _:vb50939452 . _:vb50939452 . _:vb50939452 "A syndromic X-linked intellectual disability characterized by moderate intellectual disability, seizures, dysmorphic facial features and in some older patients slowly progressive unsteady gait and progressive weakness that has_material_basis_in variation in the chromosomal region Xq21.33-q23."^^ . _:vb50939452 "url:https://www.ncbi.nlm.nih.gov/pubmed/10398239"^^ . _:vb50939452 .