_:vb50942953 . _:vb50942953 "url:https://www.ncbi.nlm.nih.gov/pubmed/12427073"^^ . _:vb50942953 . _:vb50942953 . _:vb50942953 "A retinitis pigmentosa that has_material_basis_in mutation in the USH2A gene on chromosome 1q41."^^ . _:vb50942953 . _:vb50942953 .