_:vb50942987 . _:vb50942987 . _:vb50942987 "A retinitis pigmentosa that has_material_basis_in mutation in the MAK gene on chromosome 6p24.2."^^ . _:vb50942987 . _:vb50942987 . _:vb50942987 . _:vb50942987 "url:https://www.ncbi.nlm.nih.gov/pubmed/21825139"^^ .