[1] Univ Estadual Paulista UNESP, Fac Med Botucatu FMB, Dept Especialidades Cirurg & Anestesiol, Botucatu, SP, Brazil
[2] Sabara Hosp Infantil, Sao Paulo, SP, Brazil
[3] Serv Anestesiol Pediat SAPE, Sao Paulo, Brazil
[4] Hosp Municipal Menino Jesus, Sao Paulo, SP, Brazil
[5] Inst Med Integral Prof Fernando Figueira, Recife, PE, Brazil
[6] Fac Pernambucana Saude, Recife, PE, Brazil