[1] Hosp Nacl Ninos Dr Carlos Saenz Herrera, CCSS, Emergency Dept, San Jose, Costa Rica
[2] Hosp Prof Dr JP Garrahan, Emergency Dept, Buenos Aires, DF, Argentina
[3] Ctr Hosp Pereira Rossell, Emergency Dept, Montevideo, Uruguay
[4] Hosp Infantil Dr Robert Reid Cabral, Emergency Dept, Santo Domingo, Dominican Rep
[5] Ctr Hosp Pereira Rossell, Dept Neonatol, Neonatal Intens Care Unit, Asociac Med San Jose, Montevideo, Uruguay
[6] Hosp Materno Infantil, Emergency Dept, Salta, Argentina
[7] Hosp Gen Pediatr Ninos Acosta Nu, Emergency Dept, Asuncion, Paraguay
[8] Hosp Ninos Manuel Ascencio Villaroel, Cochabamba, Bolivia
[9] Hosp San Juan Dios, Pediat Intens Care Unit, Tarija, Bolivia