Hemoglobin >= 9 gm/dl prior to biopsy (can be transfused) Hemoglobin > 8 gm/dL, patients may be transfused with red blood cells (RBC’s) Hemoglobin greater than 10 gm/dL (can be transfused); hemoglobin < 10 gm/dL due to operative blood loss is permitted Hemoglobin >= 8.0 gm/dL (can be transfused) Hemoglobin >= 8 gm/dL (may be transfused to achieve this level), AND Hemoglobin >= 9 gm/mcl (patients may be transfused to meet this requirement) Hemoglobin >= 8 gm/dL (can be transfused) within two weeks prior to enrollment Hemoglobin >= 9 gm/dL (may be transfused)