GFAP + FOXF2 + ependymal cells promote blood–brain barrier repair via DLL4–NOTCH signaling after neural injury - Qi Xie; Hui Lu; Xiaoman Wang; Siya Wu; Qian He; Mengqi Yuan; Shuang Zhang; Linlin Hu; Changxiong Gong; Xiaofeng Cheng; Yiliang Fang; Zhaoyou Meng; et al. (Proceedings of the National Academy of Sciences, 2026)