How do you choose between oral and IV cyclophosphamide for the treatment of ANCA-associated vasculitis?  

When considering cyclophosphamide for induction in severe AAV, both oral and IV regimens are reasonable routes of administration. In the CYCLOPS trial (DeGroot, Ann Int Med, 2009), oral cyclophosphamide 2mg/kg/d was compared with IV CYC 15mg/kg q 2 weeks for the first three pulses, then every 3 week...