@article{li_1991,  title={Immunomodulating Chinese herbal medicines},  volume={86},  ISSN={0074-0276},  url={https://doi.org/10.1590/S0074-02761991000600036},  DOI={10.1590/S0074-02761991000600036},  journal={Memórias do Instituto Oswaldo Cruz},  publisher={Instituto Oswaldo Cruz, Ministério da Saúde},  author={Li, Xiao-Yu},  year={1991},  pages={159–164} }