Supplementary Figure 1: Il23a^−/− mice develop regular arthritis induced by the transfer of K/BxN serum.

(a) Clinical scoring of arthritis in wild type (WT) and Il23a^−/− mice that received serum from arthritic K/BxN mice. Error bars represent SEM *P<0.05; **P<0.01; ***P<0.001; Student’s t test.