[1] Ist Ricovero & Cura Carattere Sci Burlo Garofolo, Inst Maternal & Child Hlth, Trieste, Italy
[2] Univ Trieste, Dept Pediat, Dept Med Surg & Hlth Sci, Trieste, Italy
[3] Azienda Osped Rilievo Nazl Santobono Pausillipon, Naples, Italy
[4] Santa Maria Croci Hosp, Azienda Unita Sanitaria Locale Romagna, Dept Pediat, Ravenna, Italy
[5] Reg Hosp Giovanni XXIII, Dept Pediat, Emergency Unit, Bari, Italy
[6] Azienda Osped Emergenza Cannizzaro, Catania, Italy