to test the hypothesis that rheumatoid factor ( rf ) protects against ( immune complex mediated ) renal disease , patients with rheumatoid arthritis ( ra ; 48 with nephropathy of various types , 35 without renal disease ) and systemic lupus erythematosus ( sle ; 35 with and 17 without nephritis ) were evaluated for the presence and titre of rf .
C0022658
renal disease
C0027697
nephritis