Hemoglobin >= 9.0 g/dL not requiring transfusions within the past 2 weeks Hemoglobin >= 9 g/dL (transfusions and/or erythropoietin are permitted) Hemoglobin >= 8.0 g/dL (may receive red blood cell [RBC] transfusions) For patients with solid tumors without known bone marrow involvement: hemoglobin >= 8.0 g/dL (may receive red blood cell [RBC] transfusions) For patients with solid tumors without known bone marrow involvement: hemoglobin >= 8.0 g/dL (may receive red blood cell [RBC] transfusions) * Hemoglobin >= 8.0 g/dL at baseline (may receive red blood cell [RBC] transfusions) Hemoglobin >= 8 g/dl (may receive transfusions) INCLUSION CRITERIA FOR STRATUM C: Hemoglobin >= 8 g/dl (may receive transfusions) Hemoglobin >= 10 g/dL (not requiring red blood cell [RBC] transfusions) Hemoglobin >= 8.0 g/dL at baseline (may receive red blood cell [RBC] transfusions) Hemoglobin >= 10.0 g/dL (may receive red blood cell [RBC] transfusions) Hemoglobin >= 8 g/dl (may receive transfusions) Hemoglobin >= 10 g/dL (not requiring red blood cell [RBC] transfusions) Hemoglobin >= 8.0 g/dL (may receive red blood cell [RBC] transfusions) for patients with solid tumors without bone marrow involvement