Association between IgG4 Autoantibody and Complement Abnormalities in Systemic Lupus Erythematosus

Figure 3

Comparison of serum levels of IgG4-specific IgM-RF in various groups. Detection of IgG4-specific IgM-RF in the serum of normals and SLE and RA patients was conducted by ELISA as described in Section 2 (normal = 41, SLE = 72, and RA = 67; ).