1. Mother and Child Health Department, Neonatal Intensive Care Unit, “Giovanni Paolo II” Hospital of Ragusa, ASP Ragusa, Italy.
2. Neonatal Intensive Care Unit, “G. D'Annunzio” University, Chieti, Italy.
3. Department of Pediatrics and Neonatology, School for Oncology and Developmental Biology (GROW), Maastricht University Medical Center, Maastricht, The Netherlands.
4. European Foundation for the Care of Newborn Infants (EFCNI), München.