[1] Univ Barcelona, Dept Pediat, Pediat Infect Dis Unit, Corp Sanitaria Hosp,St Joan de Deu Clin, Barcelona 08950, Spain
[2] Univ Barcelona, Corp Sanitaria Hosp, St Joan de Deu Clin, Pediat Emergency Dept, Barcelona 08950, Spain
[3] Univ Barcelona, Corp Sanitaria Hosp, St Joan de Deu Clin, Dept Microbiol, Barcelona 08950, Spain
[4] Univ Barcelona, Corp Sanitaria Hosp, St Joan de Deu Clin, Pediat Intens Care Unit, Barcelona 08950, Spain