4. They should have normal blood counts with a white blood count (WBC) count of more than or equal to 3000/mm^3 an absolute neutrophil count of more than or equal to 1500/mm^3 and a platelet count of more than 100,000/mm^3 and have no impairment of renal function (serum creatinine of less than 1.6 mg/dl), hepatic function (serum bilirubin level of < 1.2 mg/dl) and no evidence of significant cardiac or pulmonary dysfunction.