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Clinical characteristics of patients with NMOa
Abbreviations: BON = bilateral optic neuritis; BS = brainstem symptoms; EDSS = Expanded Disability Status Scale; LETM = longitudinally extensive transverse myelitis; MS = multiple sclerosis; NMO = neuromyelitis optica; ON = optic neuritis; TM = acute transverse myelitis; VEP = visual evoked potentials.
Values are n (%) of patients.
Three asymptomatic cases had VEP abnormalities.
