[1] Univ Genoa, DIMI Dept Internal Med, Allergy & Resp Dis, Genoa, Italy
[2] Arcispedale Santa Maria Nuova, Azienda Osped Reggio Emilia, Unita Operat Pneumol, Reggio Emilia, Italy
[3] Verona Univ, Asthma Ctr, Verona, Italy
[4] Verona Univ, Allergy Unit, Verona, Italy
[5] Gen Hosp, Verona, Italy
[6] Osped La Colletta, Pneumol, Arenzano, Italy
[7] Univ Torino, Dept Med Sci, Turin, Italy
[8] IRCSS, Fdn Policlin A Gemelli, Allergy Unit, Rome, Italy