[1] Neonatal Intens Care Unit, Pescara, Italy
[2] Urol Unit, Pescara, Italy
[3] Meyer Childrens Univ Hosp, Pediat Intens Care Unit, Florence, Italy
[4] Santobono Pausilipon Childrens Hosp, Neonatal Intens Care Unit, Naples, Italy
[5] ASL02, Abruzzo, Italy
[6] Univ Florence, Hlth Sci Dept, Florence, Italy