aggressive myeloma life expectancymultiple myeloma life expectancymyeloma leukemia life expectancymyeloma cancer life expectancymyeloma life expectancy elderlystage 3 myeloma life expectancysmouldering myeloma life expectancyblood cancer myeloma life expectancymulti myeloma cancer life expectancybone cancer myeloma life expectancyplasmacytoma life expectancyplasma cancer life expectancy