Patients with one or more of the following: serum creatinine greater than 2.5 mg/dl or creatinine clearance less than 35 ml/min; pulmonary disease resulting in a pO(2) less than 70 mmHg, or FVC, FEV(1) or DLCO less than 70% of predicted; any Wegener's granulomatosis-related disease manifestation that, in the judgment of the investigators, is immediately life-threatening.