@article{li_liu_fang_xu_dong_yang_zhang_guo_ding_2022,  title={Effects of Vitamin A and K<sup>3</sup> on Immune Function and Intestinal Antioxidant Capacity of Aged Laying Hens},  volume={24},  ISSN={1516-635X},  url={https://doi.org/10.1590/1806-9061-2021-1572},  DOI={10.1590/1806-9061-2021-1572},  number={4},  journal={Brazilian Journal of Poultry Science},  publisher={Fundação de Apoio à Ciência e Tecnologia Animal},  author={Li, L and Liu, Z and Fang, B and Xu, J and Dong, X and Yang, L and Zhang, Z and Guo, S and Ding, B},  year={2022},  pages={eRBCA-2021-1572} }