_:vb50945484 . _:vb50945484 "A congenital nystagmus that has_material_basis_in heterozygous mutation in a region of chromosome 13q31-q33."^^ . _:vb50945484 . _:vb50945484 . _:vb50945484 "url:https://www.ncbi.nlm.nih.gov/pubmed/12525540"^^ . _:vb50945484 . _:vb50945484 .