@article{pei_li_2021,  title={Huangkui Capsule in Combination with Leflunomide Improves Immunoglobulin A Nephropathy by Inhibiting the TGF-β1/Smad3 Signaling Pathway},  volume={76},  ISSN={1807-5932},  url={https://doi.org/10.6061/clinics/2021/e2904},  DOI={10.6061/clinics/2021/e2904},  journal={Clinics},  publisher={Faculdade de Medicina / USP},  author={Pei, Shuwen and Li, Yan},  year={2021},  pages={e2904} }