title: How safe is hydroxyurea in the treatment of polycythemia vera?
mesh_terms: D000368:Aged; D000986:Antisickling Agents / Q000009:adverse effects / Q000627:therapeutic use; D006801:Humans; D006918:Hydroxyurea / Q000009:adverse effects / Q000627:therapeutic use; D008875:Middle Aged; D011087:Polycythemia Vera / Q000188:drug therapy*
chemical_list: D000986:Antisickling Agents; D006918:Hydroxyurea