Comparison of clinicopathological features and prognosis between IgA nephropathy and purpura nephritis in adults with diffuse endocapillary proliferation: a single-center cohort study - Yu, Jin; Ni, Xiaoqiu; Ni, Jun; Jiang, Fei; Yu, Dongrong; Zhou, Liusha (Annals of Palliative Medicine, 2020)