[1] Inst Med Integral Prof Fernando Figueira, Recife, PE, Brazil
[2] Fac Pernambucana Saude, Recife, PE, Brazil
[3] Hosp Infantil Sabara, Sao Paulo, SP, Brazil
[4] Hosp Infantil Darcy Vargas, Sao Paulo, SP, Brazil
[5] Hosp Felicio Rocho, Belo Horizonte, MG, Brazil
[6] Univ Fed Sao Paulo, Escola Paulista Med, Disciplina Anestesiol Dor & Terapia Intens, Sao Paulo, SP, Brazil
[7] Inst Doutor Jose Frota, Fortaleza, CE, Brazil
[8] Univ Sao Paulo, Fac Med, Disciplina Anestesiol, Sao Paulo, SP, Brazil
[9] Univ Sao Paulo, Hosp Clin, Fac Med, Sao Paulo, SP, Brazil
[10] SAPE, Serv Anestesiol Pediat, Joao Pessoa, Brazil
[11] Hosp Municipal Menino Jesus, Sao Paulo, SP, Brazil
[12] Hosp Pequeno Principe, Curitiba, PR, Brazil
[13] Univ Estadual Paulista UNESP, Fac Med Botucatu FMB, Dept Especialidades Cirurg & Anestesiol, Botucatu, SP, Brazil