_:vb50945379 . _:vb50945379 "An X-linked nonsyndromic deafness characterized by severe bilateral sensorineural hearing loss with cochlear malformation in males and mild to moderate hearing loss in females with later onset that has_material_basis_in mutation in COL4A6 on chromosome Xq22.3."^^ . _:vb50945379 . _:vb50945379 . _:vb50945379 . _:vb50945379 . _:vb50945379 "url:https://www.ncbi.nlm.nih.gov/pubmed/23714752"^^ .