_:vb50943047 "url:https://www.ncbi.nlm.nih.gov/pubmed/2300556"^^ . _:vb50943047 . _:vb50943047 . _:vb50943047 . _:vb50943047 "A retinitis pigmentosa that has_material_basis_in variation in the chromosome region Xp21.3-p21.2."^^ . _:vb50943047 . _:vb50943047 .