Headache prevalence and types in multiple sclerosis and related neuroimmunological diseases: A multicenter study. - Masuda H; Uzawa A; Shibata M; Mori M; Miyazaki Y; Niino M; Fujimori J; Nakashima I; Takai Y; Yamazaki N; Misu T; Kinoshita M; et al. (Cephalalgia : an international journal of headache, 2026)