_:vb50943012 "A retinitis pigmentosa that has_material_basis_in mutation in the PRPF4 gene on chromosome 9q32."^^ . _:vb50943012 "url:https://www.ncbi.nlm.nih.gov/pubmed/24419317"^^ . _:vb50943012 . _:vb50943012 . _:vb50943012 . _:vb50943012 . _:vb50943012 .