Severe pneumonia caused by Nocardia otitidiscaviarum in a patient with bronchiectasis and IgA nephropathy: a case report - Lin, Yi; Jiang, Zhao-Zhao; Chi, Xiao-Qian; Chen, Jian-Sheng; Wen, Chao; Zhang, Chao; Wang, Ying-Ying; Xie, Guang-Liang (Frontiers in Medicine, 2025)