Mycophenolate mofetil for maintenance therapy of Wegener's granulomatosis and microscopic polyangiitis: a pilot study in 11 patients with renal involvement - Nowack, Rainer; Göbel, Ursula; Klooker, Pieter; Hergesell, Olaf; Andrassy, Konrad; Woude, Fokko J. van der (Journal of the American Society of Nephrology, 1999)