Effects of various supplemental levels of multi-enzyme complex on amino acid profiles in egg yolk, antioxidant capacity, cecal microbial community and metabolites of laying hens - Huang, Qixin; Chen, Rui; Wu, Wenzi; Fan, Jinghui; Ma, Xin; Chen, Zhou; Ye, Wenxin; Qian, Lichun (Frontiers in Microbiology, 2024)