[1] Perrino Hospital,
[2] Neonatology,undefined
[3] IFC-CNR,undefined
[4] Lecce Section,undefined
[5] Perrino Hospital,undefined
[6] Neonatology,undefined
[7] University of Pisa and ISBEM(Euro Mediterranean Scientific Biomedical Institute),undefined
[8] Cardiothoracic,undefined
[9] Azienda Ospedaliera Universitaria Senese,undefined
[10] Neonatal Intensive Care Unit,undefined
[11] Acta Paediatrica,undefined
[12] ,undefined
[13] Karolinska University Hospital,undefined