- Patients must have normal organ and marrow function as defined as: leukocytes >3,000/mcL; absolute neutrophil count >1,500/mcL; platelets >100,000/mcL; hemoglobin > 8 g/dl; Creatinine clearance (estimated by Cockroft-Gault equation) >50-mL/min/1.73 m2 for patients with creatinine levels above institutional normal