1. Paediatric Intensive Care Unit, Institut de Recerca Hospital Sant Joan de Déu, University of Barcelona, Barcelona, Spain;
2. Neonatology Department, BCNatal, Hospital Sant Joan de Déu-Clínic, University of Barcelona, Barcelona, Spain;
3. Paediatric Intensive Care Unit, Hospital Joan XXIII, Tarragona, Spain;
4. Disorders of Immunity and Respiration of the Paediatric Critical Patients Research Group. Institut de Recerca Hospital Sant Joan de Déu, Hospital Sant Joan de Déu, Barcelona, Spain;
5. Radiology Department, Hospital Sant Joan de Déu-Clínic, University of Barcelona, Barcelona, Spain;
6. Paediatric Cardiology Department, Hospital Sant Joan de Déu-Clínic, University of Barcelona, Barcelona, Spain;
7. Paediatric Intensive Care Unit, CIBERESP, Hospital Sant Joan de Déu-Clínic, University of Barcelona, Barcelona, Spain