_:vb50946172 . _:vb50946172 . _:vb50946172 . _:vb50946172 "url:https://pubmed.ncbi.nlm.nih.gov/29726989/"^^ . _:vb50946172 . _:vb50946172 . _:vb50946172 "A retinitis pigmentosa that has_material_basis_in homozygous or compound heterozygous mutation in AHR on chromosome 7p21.1."^^ .