Evaluation of the performance of large language models in responding to medical questions related to multiple sclerosis: A case study of large language models including ChatGPT, Gemini, Grok and Copilot. - Dastani, Meisam; Sajjadi, Mohammad Shayan; Yamout, Bassem; Arab Bafrani, Melika; Nasirzadeh, Amirreza (PLoS ONE, 2026)