Original article
Sleep disorders in patients with multiple sclerosis in Spain
Trastornos del sueño en pacientes con esclerosis múltiple en España
a Multiple Sclerosis Unit, Neurology Service, Vithas Nisa Hospital, Seville, Spain
b Department of Neurology, Yan’an University Medical College No. 3 Affiliated Hospital, Shaanxi, China
c International Doctoral School, University of Seville, Spain
d Department of Ophthalmology, Hermanos Ameijeiras Hospital, Habana, Cuba
