[1] Charite Univ Med Berlin, Berlin, Germany
[2] Free Univ Berlin, Berlin, Germany
[3] Humboldt Univ, Dept Pediat Resp Med Immunol & Crit Care Med, Berlin, Germany
[4] Charite Univ Med Berlin, Inst Allergol, Berlin, Germany
[5] Fraunhofer Inst Translat Med & Pharmacol ITMP, Dept Allergol & Immunol, Berlin, Germany
[6] Altrastatistica, Consultancy & Training Biostat, Rome, Italy
[7] Thermo Fisher Sci, Uppsala, Sweden
[8] IDI IRCCS, Clin & Lab Mol AllergyUnit, Rome, Italy
[9] San Giuseppe Hosp, Pediat Unit, Empoli, Italy
[10] Univ Parma, Dept Med & Surg, Clin Pediat, Parma, Italy
[11] Pediat Libera Scelta, Benevento, Italy
[12] Univ Roma Tor Vergata, Policlin Tor Vergata, UOSD Immunopatol Allergol Pediat, Rome, Italy
[13] Univ Pisa, Dept Clin & Expt Med, Sect Paediat, Pisa, Italy
[14] Univ Roma La Sapienza, Pediat Dept, Rome, Italy
[15] Univ Campania Luigi Vanvitelli, Dipartimento Donna Bambino & Chirurg Gen & Special, Naples, Italy
[16] Fatebenefratelli Hosp, Pediat Unit, Benevento, Italy
[17] Sandro Pertini Hosp, Pediat Dept, Rome, Italy
[18] Sandro Pertini Hosp, Pediat Allergol Unit, Rome, Italy
[19] IRCCS Azienda Osped Univ Bologna, Pediat Unit, Bologna, Italy
[20] Fdn IRCCS Ca Granda Osped Maggiore Policlin, Pediat Intermediate Care Unit, Milan, Italy
[21] San Carlo Clin, Allergol Serv, Milan, Italy
[22] San Camillo Forlanini Hosp, Pediat Unit, Rome, Italy
[23] ASL Crotone, Pediat Unit, Crotone, Italy
[24] St Barbara Hosp, Pediat Unit, Iglesias, Italy
[25] Univ Verona, Dept Life & Reprod Sci, Pediat Sect, Verona, Italy
[26] Grassi Hosp, Pediat Unit, Rome, Italy
[27] G Gaslini Hosp, Pulm Dis & Allergy Unit, Genoa, Italy
[28] Clin San Carlo, Ambula torio Allergol, Paderno Dugnano, Italy