Molecular patterns of matrix protein 1 (M1): A strong predictor of adaptive evolution in H9N2 avian influenza viruses - Yanting Zhu; Yulin Cong; Yixue Sun; Shouzhi Sheng; Chang Liu; Jianfeng Jiang; Siqi Li; Pengju Zhang; Chao Gao; Jinghui Zhao; Yanlong Cong (Proceedings of the National Academy of Sciences, 2025)