Zheng X, Xu J, Yin J, Fan J, Gong Y, Yang J. Causal links between gut microbiota, plasma metabolites, and insomnia: Insights from Mendelian randomization. Dialogues Clin Neurosci. 2026 Dec;28(1):85-94. doi: 10.1080/19585969.2026.2636470. Epub 2026 Feb 27. PMID: 41760581; PMCID: PMC12951660.