Intravenous pulse administration of cyclophosphamide versus daily oral treatment in patients with antineutrophil cytoplasmatic antibody-associated vasculitis and renal invovement. A prospective, randomised study. - Haubitz,M.; Schellong,S.; Göbel,U.; Schurek,HJ.; Schaumann,D.; Koch,KM.; Brunkhorst,R. (Arthritis Rheum, 1998)