Peripheral and central immune features in insomnia: Integrative bulk and single-cell transcriptomic analyses reveal core hub genes and candidate compounds - Wenwen Zhu; Zhijuan Wen; Yimeng Gao; Bijuan He; Ruitong Chen; Haosen Pan; Wei Bin; Zhimin Yang; Fei Tan (Functional & Integrative Genomics, 2026)