Knowledge graph-guided multiple sclerosis identification and therapeutic trend analysis: Real-world evidence from two large healthcare systems - Ziming Gan; Wen Zhu; Weijing Tang; Sara Morini Sweet; Michele Morris; Yunqing Han; Chenyi Chen; Junwei Lu; Emily Song; Mohammed Moro; Shyam Visweswaran; Tianrun Cai; et al. (PLOS Digital Health, 2026)