[1] Univ Sao Paulo, Fac Med Ribeirao Preto, Ribeirao Preto, SP, Brazil
[2] Hosp Clin Porto Alegre, Porto Alegre, RS, Brazil
[3] Emory Univ, Sch Med, Grady Mem Hosp, Marcus Stroke & Neurosci Ctr, Atlanta, GA USA
[4] Univ Fed Sao Paulo, Sao Paulo, SP, Brazil
[5] Hosp Base Brasilia, Brasilia, DF, Brazil
[6] Univ Sao Paulo, Fac Med, Sao Paulo, SP, Brazil
[7] Univ Estadual Paulista, Fac Med Botucatu, Botucatu, SP, Brazil
[8] Hosp Pro Cardiaco, Rio De Janeiro, RJ, Brazil
[9] Univ Fed Minas Gerais, Belo Horizonte, MG, Brazil
[10] Univ Fed Fluminense, Niteroi, RJ, Brazil
[11] Inst Dor Pesquisa & Ensino, Rio De Janeiro, RJ, Brazil
[12] Hosp Municipal Sao Jose, Div Neurol, Joinville, SC, Brazil
[13] Hosp Geral Fortaleza, Fortaleza, Ceara, Brazil
[14] Hosp Restauracao, Recife, PE, Brazil
[15] Hosp Sirio Libanes, Sao Paulo, SP, Brazil
[16] Univ Fed Bahia, Salvador, BA, Brazil
[17] Santa Casa Sao Paulo, Fac Ciencias Med, Sao Paulo, SP, Brazil
[18] Univ Fed Sao Paulo, Sao Paulo, SP, Brazil
[19] Hosp Israelita Albert Einstein, Sao Paulo, SP, Brazil