[1] FLENI, Inst Neurol Res Raul Carrea, Dept Neurol, Buenos Aires, DF, Argentina
[2] ABC Hosp Santa Fe, Natl Inst Neurol & Neurosurg, Dept Neurol, Mexico City, DF, Mexico
[3] ABC Hosp Santa Fe, Neurol Ctr, Mexico City, DF, Mexico
[4] Clin Marly, Serv Neurol, Bogota, Colombia
[5] Entidad Prestadora Serv Salud Nogales, Bogota, Colombia
[6] Pontificia Univ Catolica Chile, Dept Neurol, Santiago, Chile
[7] Univ Fed Sao Paulo, Dept Neurol, Sao Paulo, Brazil