Cognitive function is associated with risk of conversion to secondary progressive multiple sclerosis: A cross-sectional study - Omid Mirmosayyeb; Ida Mohammadi; Shahryar Rajai Firouzabadi; Saeed Vaheb; Mohammad Yazdan Panah; Tom A. Fuchs; Bianca Weinstock-Guttman; Vahid Shaygannejad (PLoS ONE, 2026)