1. Hoffman GS, Kerr GS, Leavitt RY, Hallahan CW, Lebovics RS, Travis WD et al. Wegener granulomatosis: an analysis of 158 patients. Ann Intern Med. 1992; 116:488-98. 2. Fauci AS, Haynes BF, Katz P, Wolff SM. Wegener’s granulomatosis: prospective clinical and therapeutic experience with 85 patients for 21 years. Ann Intern Med. 1983; 98: 76-85. 3. Reinhold-Keller E, Beuge N, Latza U, de Groot K, Rudert H, Nolle B et al. An Interdisciplinary approach to the care of patients with Wegener’s granulomatosis: long-term outcome in 155 patients. Arthritis Rheum. 2000; 43:1021-32. 4. Lê Thi Huong D, Wechsler B, de Gennes C, Raguin G, Piette JC, Blétry O et al. Evolutive and prognostic aspects of Wegener’s granulomatosis. Rev Rhum Mal Osteoartic. 1989;56:583-8. 5. Briedigkeit L, Kettritz R, Gobel U, Natusch R. Prognostic factors in Wegener’s granulomatosis. Postgrad Med J. 1993; 69: 856-61. 6. Koldingsnes W, Nossent H. Predictors of survival and organ damage in Wegener’s granulomatosis. Rheumatol. 2002; 41: 572-81. 7. Weidner S, Geuss S, Hafezi-Rachti S, Wonka A, Rupprecht HD. ANCA-associated vasculitis with renal involvement: an outcome analysis. Nephrol Dial Transplant. 2004; 19:1403-11. 8. Guillevin L, Cordier JF, Lhote F, Cohen P, Jarrousse B, Royer I et al. A prospective, multicenter, randomized trial comparing steroids and pulse cyclophosphamide versus steroids and oral cyclophosphamide in the treatment of generalized Wegener’s granulomatosis. Arthritis Rheum. 1997; 40: 2187-98. 9. Kaplan E, Meier P. Non parametric estimation for incomplete information. J Ann Stat Assoc. 1958; 53: 457-81. 10. Cox D. Regression models and life tables. J R Stat Soc [Ser A]. 1972; 34:187-219. 11. Anderson G, Coles ET, Douglas AC, Crane M, Gibbs AR, Geddes DM et al. Wegener’s granuloma. A series of 265 British cases seen between 1975 and 1985. A report by a subcommittee of the British Thoracic Society Research Committee. Q J Med. 1992; 83:427-38. 12. Aasarod K, Iversen BM, Hammerstrom J, Bostad L, Vatten L, Jorstad S. Wegener’s granulomatosis: clinical course in 108 patients with renal involvement. Nephrol Dial Transplant. 2000; 15: 611-8. 13. Slot MC, Tervaert JWC, Franssen CFM, Stegeman CA. Renal survival and prognostic factors in patients with PR3-ANCA associated vasculitis with renal involvement. Kidney Int. 2003; 63: 670-7. 14. Luqmani RA, Bacon PA, Beaman M et al. Classical versus non-renal Wegener’s granulomatosis. Q J Med. 1994; 87:161-7. 15. Matteson EL, Gold KN, Bloch DA, Hunder GG. Long-term survival of patients with Wegener’s granulmatosis from the American College of Rheumatology. Wegener’s Classification Criteria Cohort. Am J Med. 1996; 101:129-34. 16. Koldingsnes W, Nossent JC. Baseline features and initial treatment as predictors of remission and relapse in Wegener’s granulomatosis. J Rheumatol. 2003; 30: 80-8. 17. Stegeman CA, Tervaert JWC, Sluiter WJ, M