Affiliation: | Department of Neurology and Neurosurgery, Division of General Neurology and Ataxias, Universidade Federal de São Paulo, São Paulo, Brazil;Department of Internal Medicine, Universidade Federal do Rio Grande do Sul, Brazil Hospital de Clínicas de Porto Alegre, Brazil;Department of Biochemistry, Universidade Federal do Rio Grande do Sul, Brazil Hospital de Clínicas de Porto Alegre, Brazil |