title: Letter: Bone-marrow responses in polycythemia vera.
mesh_terms: D001853:Bone Marrow / Q000502:physiology*; D001854:Bone Marrow Cells; D002999:Clone Cells; D003470:Culture Media; D004912:Erythrocytes / Q000502:physiology; D004921:Erythropoietin / Q000494:pharmacology; D006801:Humans; D011087:Polycythemia Vera / Q000175:diagnosis / Q000503:physiopathology*
chemical_list: D003470:Culture Media; D004921:Erythropoietin