CD79A and Anxiety: Figures 3, 4 showed the decision tree models of IgG and IgA between IBS patients with persistent symptoms and HCs (Figures 3A, 4A), IBS patients with severe abdominal pain/discomfort and HCs (Figures 3B, 4B), IBS patients with severe symptoms and HCs (Figures 3C, 4C), IBS patients with severe anxiety and HCs (Figures 3D, 4D).