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Serum levels of IgA1, Gd-IgA1, sC3, and C3a in patients with IgAN of 3 groups. a–d: IgA1, Gd-IgA1, sC3, and C3a levels, respectively. IgAN, IgA nephropathy; IgAN-MA, patients with IgAN with microangiopathic lesions; IgAN-AS, patients with IgAN with arteriosclerosis/arteriolosclerosis lesions; IgAN-NO, patients with IgAN without vascular lesions.
