RT Journal Article SR Electronic T1 Safety and efficacy of leflunomide in the treatment of lupus nephritis refractory or intolerant to traditional immunosuppressive therapy: an open label trial JF Annals of the Rheumatic Diseases JO Ann Rheum Dis FD BMJ Publishing Group Ltd and European League Against Rheumatism SP 417 OP 418 DO 10.1136/ard.2005.044248 VO 65 IS 3 A1 L-S Tam A1 E K Li A1 C-K Wong A1 C W K Lam A1 W-C Li A1 C-C Szeto YR 2006 UL http://ard.bmj.com/content/65/3/417.abstract AB