Methylprednisolone and cyclophosphamide, alone or in combination, in patients with lupus nephritis. A randomized, controlled trial

Mark F. Gourley, MD; Howard A. Austin III, MD; Dorothy Scott, MD; Cheryl H. Yarboro, RN; Ellen M. Vaughan, RN; Joanne Muir, RN; Dimitrios T. Boumpas, MD; John H. Klippel, MD; James E. Balow, MD; and Alfred D. Steinberg, MD