[1] Meyer Childrens Univ Hosp, Infect Dis Unit, Florence, Italy
[2] Univ Turin, Regina Margherita Childrens Hosp, Pediat Infect Dis Unit, Turin, Italy
[3] Univ Padua, Div Pediat Infect Dis, Dept Woman & Child Hlth, Padua, Italy
[4] Policlin St Orsola, Pediat Emergency Unit, Bologna, Italy
[5] Univ Naples Federico II, Sect Pediat, Dept Translat Med Sci, Naples, Italy
[6] San Martino Hosp, UOC Pediat, Belluno, Italy
[7] ASST Santi Paolo & Carlo Hosp, Dept Pediat, Milan, Italy
[8] Osped Bambino Gesu IRCCS, Univ Hosp Dept, Rome, Italy
[9] Univ Florence, Dept Hlth Sci, Florence, Italy