_:vb50942940 . . . "A retinitis pigmentosa that has_material_basis_in mutation in the RPE65 gene on chromosome 1p31."^^ . . _:vb50942940 . "OMIM:613794"^^ . _:vb50942940 . "ICD10CM:H35.5"^^ . "disease_ontology"^^ . "retinitis pigmentosa 20"^^ . _:vb50942940 . . "DOID:0110353"^^ . _:vb50942940 . "RP20"@en .