_:vb50948388 "url:http://www.cancer.gov/dictionary?CdrID=45343"^^ . _:vb50948388 . _:vb50948388 . _:vb50948388 . _:vb50948388 "url:http://en.wikipedia.org/wiki/Leukemia"^^ . _:vb50948388 . _:vb50948388 . _:vb50948388 . _:vb50948388 . _:vb50948388 "A cancer that affects the blood or bone marrow characterized by an abnormal proliferation of blood cells."^^ .