_:vb50943002 . _:vb50943002 . _:vb50943002 "A retinitis pigmentosa that has_material_basis_in mutation in the RP9 gene on chromosome 7p14."^^ . _:vb50943002 . _:vb50943002 . _:vb50943002 "url:https://www.ncbi.nlm.nih.gov/pubmed/12032732"^^ . _:vb50943002 .