[1] Catholic Univ Sacre Hearth, Policlin Gemelli Univ Fdn IRCCS, Pediat Allergy Unit, Dept Life Sci & Publ Hlth,Pediat Sect, Rome, Italy
[2] Salesi Childrens Hosp, Dept Mother & Child Hlth, Pediat Unit, Ancona, Italy
[3] Meyer Childrens Hosp IRCCS, Allergy Unit, I-50139 Florence, Italy
[4] Univ Florence, Dept Hlth Sci, I-50139 Florence, Italy
[5] AOU Policlin Bari, Pediat Hosp Giovanni 24, Pediat & Emergency Dept, I-70126 Bari, Italy
[6] Univ Verona, Dept Surg Sci Dent Gynecol & Pediat, Pediat Unit, I-37126 Verona, Italy
[7] Latisana Palmanova Hosp, Azienda Sanitaria Universitaria Friuli Cent, Pediat Dept, I-33100 Latisana, Udine, Italy
[8] Univ Pavia, Dept Clin Surg Diag & Pediat Sci, I-27100 Pavia, Italy
[9] Fdn IRCCS Policlin San Matteo, Pediat Clin, I-27100 Pavia, Italy
[10] IRCCS, Bambino Gesu Childrens Hosp, Div Allergy, Translat Res Pediat Specialties Area, Rome, Italy
[11] Univ Campania Luigi Vanvitelli, Dept Woman Child & Gen & Specialized Surg, I-80138 Naples, Italy