Tetramethylpyrazine promotes spinal cord injury repair by modulating macrophage M1/M2 polarization via inhibition of the IL-6/JAK2/STAT3 pathway - Huizhong Bai; Luyao Huo; Ruiqin Yu; Bowen Deng; Jiashu Yue; Yu Jiang; Yimin Zhou; Yi Zhao; Xiaohong Mu (Toxicology and Applied Pharmacology, 2026)