1. Neonatal Intensive Care Unit, Paediatric Department Hospital Germans Trias i Pujol Badalona Spain
2. Institut d'Investigació Germans Trias I Pujol Badalona Spain
3. Neonatology Division Careggi University Hospital of Florence Florence Italy
4. Paediatric Intensive Care Unit, Hospital Sant Joan de Déu University of Barcelona Barcelona Spain
5. Immunological and Respiratory Disorders in the Paediatric Critical Care Patient Research Group, Institut de Recerca Hospital Sant Joan de Déu Hospital Sant Joan de Déu Barcelona Spain
6. Department of Translational Medical Sciences, Neonatology Division Università “Federico II” Napoli Italy