Clinical remission trajectories and histopathological associations in patients with IgA nephropathy treated with targeted-release budesonide: a real-world cohort study - Dafeng He; Jun Xu; Bo Gao; Mingzhu Jiang; Wenjin Liu; Chuanyan Zhao; Xinrui Li; Chunlei Lu; Mengyue Zhu; Hongbin Mou; Guangyu Bi (Frontiers in Immunology, 2026)