Vertical saccadic slowing is associated with fatigue in multiple sclerosis. - Ruiz-Ortiz, Mariano; García-Cena, Cecilia; Hernández-Ramírez, Rosa; Moreno-García, Sara; Labiano-Fontcuberta, Andrés; García-Bellido Ruiz, Sara; Petronila-Cubas, Carlos; Guzmán-Villamarín, Diego Enrique; Benito-León, Julián (Fatigue: Biomedicine, Health & Behavior, 2026)