_:vb50945182 "url:https://www.ncbi.nlm.nih.gov/pubmed/10676771"^^ . _:vb50945182 "A primary polycythemia characterized by high oxygen affinity hemoglobin and compensatory polycythemia that has_material_basis_in heterozygous mutation in HBB on chromosome 11p15.4."^^ . _:vb50945182 . _:vb50945182 . _:vb50945182 . _:vb50945182 "url:https://www.ncbi.nlm.nih.gov/pubmed/17795074"^^ . _:vb50945182 . _:vb50945182 .