1 Neonatal Intensive Care Unit, Puerta del Mar University Hospital, Cádiz, Spain. almudena.alonso.sspa@juntadeandalucia.es.
2 Research Unit, Biomedical Research and Innovation Institute of Cádiz (INiBICA), Puerta del Mar University Hospital, Cádiz, Spain. almudena.alonso.sspa@juntadeandalucia.es.
3 Division of Neonatology, Department of Translational Medical Sciences, Università "Federico II", Naples, Italy.