[1] Hosp Villa El Salvador, Dept Cuidados Intens Pediat, Lima, Peru
[2] Inst Nacl Salud Nino San Borja, Dept Pediat, Lima, Peru
[3] Univ Nacl Federico Villarreal, Fac Med, Lima, Peru
[4] Univ Texas Houston, Dept Pediat, Ctr Ciencias Salud, Houston, TX USA