1 Infectious Diseases Department, Hospital Sant Joan de Déu, Barcelona, Spain.
2 Pediatrics Department, Hospital Sant Joan de Déu, Barcelona, Spain.
3 Pediatric Intensive Care Unit, Hospital Sant Joan de Déu, Barcelona, Spain, Hospital Sant Joan de Déu, Passeig Sant Joan de Déu 2, 08950 Esplugues, Spain.
4 Pediatrics Department, Hospital Sant Pau, Barcelona, Spain, Hospital Sant Pau, Carrer de Sant Quintí, 89, 08041 Barcelona, Spain.