6. Adequate organ functions are preserved as WBC more than 4000/mm3,Hb more than 8.0g/dl,neutrophil more than 2000/mm3,platlet more than 100,000/mm3, AST less than 2.5 x normal or less than 5.0 x normal if the patient had known liver metastasis, bilirubin less than 2.0mg/dl, Ccr more than 60ml/min