[1] Fed Univ Rio Janeiro, Dept Neurosurg, Rio De Janeiro, Brazil
[2] Souza Marques Educ Tech Fdn, Dept Neurosurg, Rio De Janeiro, Brazil
[3] Max Planck Univ Ctr, Dept Neurosurg, Indaiatuba, Brazil
[4] Univ Estadual Ponta Grossa, Dept Neurosurg, Ponta Grossa, Parana, Brazil
[5] Ninth July Univ, Dept Neurosurg, Sao Paulo, Brazil
[6] Univ West Santa Catarina, Dept Neurosurg, Joacaba, Brazil
[7] Fac Med Multivix, Dept Neurosurg, Cachoeiro de Itapemirim, Brazil
[8] Univ Sao Paulo, Dept Neurosurg, Sao Paulo, Brazil
[9] Inst Tratar, Dept Neurosurg, Sao Paulo, Brazil
[10] Univ Estadual Campinas, Dept Neurosurg, Campinas, Brazil
[11] Nucl Oscar Freire, Dept Neurosurg, Salvador, Brazil