Clinical features associated with cerebrospinal fluid Epstein–Barr virus positivity in autoimmune GFAP astrocytopathy: a multicenter retrospective cohort study - Xing Mao; Qianqian Qu; Chao Quan; Haidong Lyu; Jingzi Zhangbao; Xuan Wang; Hongmei Tan; Xiang Li (Frontiers in Neurology, 2026)