- adequate organ function defined as WBC count 4,000/µL, platelet count 100,000/µL, hemoglobin 10 g/dL, serum creatinine 1.5 mg/dL or creatinine clearance 60 mL/min, and direct bilirubin 1.5 mg/dL; and forced expiratory volume at 1 second more than 2.0 L or 75% of predicted for height and age from pre-enrollment pulmonary function testing