Author correction to “Sphingosine-1-phosphate, a novel TREM2 ligand, promotes microglial phagocytosis to protect against ischemic brain injury” [Acta Pharm Sin B 12 (2022) 1885–1898] - Tengfei Xue; Juan Ji; Yuqin Sun; Xinxin Huang; Zhenyu Cai; Jin Yang; Wei Guo; Ruobing Guo; Hong Cheng; Xiulan Sun (Acta Pharmaceutica Sinica B)