People with multiple sclerosis help design a tool to measure physical functioning and how it affects their daily lives: a plain language summary. - Kamudoni P; Amtmann D; Johns J; Cook KF; Salem R; Salek S; Raab J; Middleton R; Repovic P; Alschuler KN; Geldern GV; Wundes A; et al. (Neurodegenerative disease management, 2024)