The abstract is here.
What I have to say: Cyclophosphamide, although saves WG patients from death, it also has dangers of its own. Many patients who have had to take this medication find that they are at risk for cancer. The new drugs like Rituxan, Imuran, and Methotrexate are less dangerous to the patient in the long-term. However, if the patient has a really bad case of Vasculitis, then Cyclophosphamide may be the only short-term solution.