Long COVID in people with multiple sclerosis and related disorders: a multicenter cross-sectional study. - Hu C; Son J; McAlpine L; Walker EL; Dahl M; Song E; Ferreira Brito S; Kavak K; Onomichi K; Bar-Or A; Perrone C; Riley CS; et al. (MedRxiv : the preprint server for health sciences, 2025)