Fig. 1.
Direct association between the IgG–anti-κ and IgG–anti-F(ab′)2 autoantibody in patients with cold agglutination. In the serum of 204 patients with cold agglutination, the IgG–anti-κ and IgG–anti-F(ab′)2 autoantibody titers were measured by enzyme-linked immunosorbent assay (ELISA). Antibody titers (median ± MAD) are given in OD 405 nm (ordinate).