_:vb50942967 . _:vb50942967 . _:vb50942967 "url:https://www.ncbi.nlm.nih.gov/pubmed/14681825"^^ . _:vb50942967 . _:vb50942967 . _:vb50942967 . _:vb50942967 "A retinitis pigmentosa that has_material_basis_in mutation in the CERKL gene on chromosome 2q31."^^ .