[1] IRCCS Fdn Stella Maris, Dept Dev Neurosci, Pisa, Italy
[2] Univ Florence, Tuscan PhD Programme Neurosci, Florence, Italy
[3] Univ Pisa, Dept Clin & Expt Med, Pisa, Italy
[4] Pisa Univ Hosp Santa Chiara, Neonatal Intens Care Unit, Pisa, Italy
[5] Univ Florence, Careggi Univ Hosp, Div Neonatol, Florence, Italy
[6] Childrens Hosp A Meyer, Neonatal Intens Care Unit, Florence, Italy