[1] Univ Hosp Modena, Neonatal Intens Care Unit, Via Pozzo 71, I-41124 Modena, Italy
[2] Univ Modena & Reggio Emilia, PhD Program Clin & Expt Med, Modena, Italy
[3] Univ Modena & Reggio Emilia, Pediat Postgrad Sch, Modena, Italy
[4] Univ Modena & Reggio Emilia, Dept Med & Surg Sci Mothers Children & Adults, Pediat Unit, Modena, Italy
[5] Univ Modena & Reggio Emilia, Dept Med & Surg Sci Mothers Children & Adults, Obstet & Gynecol Unit, Modena, Italy