[1] Univ Roma Tor Vergata, Postgrad Sch Resp Med, Dept Expt Med, Rome, Italy
[2] Univ Hosp Ospedali Riuniti, Dept Internal Med, Allergy Unit, Ancona, Italy
[3] Polytech Univ Marche, Dept Clin & Mol Sci, Ancona, Italy
[4] S Corona Hosp, Div Pulmonol, Savona, Italy
[5] Chiesi Farm, Global Clin Dev, Parma, Italy
[6] Univ Parma, Dept Med & Surg, Resp Dis & Lung Funct Unit, Parma, Italy
[7] G Fucito Hosp, Allergy & Clin Immunol, Salerno, Italy
[8] Univ Hosp, Salerno, Italy
[9] Univ Naples Federico II, Dept Translat Med Sci & Interdepartmental Ctr Res, Naples, Italy
[10] Presidio Sanitario Polispecialist Loreto Crisp, Allergy Unit, Naples, Italy
[11] Osped Riuniti Penisola Sorrentina, Allergy Ctr, Div Internal Med, Naples, Italy
[12] Reg Environm Protect Agcy Campania Reg ARPAC, Naples, Italy
[13] High Special San Giuseppe Moscati Hosp, Allergy Unit, Avellino, Italy
[14] Fatebenefratelli Hosp, Unit Allergol, Div Internal Med, Benevento, Italy
[15] ASL Sud & ASL Nord, Allergy & Clin Immunol Unit, Naples, Italy
[16] ASL Na 3, Allergy Unit, Sanit Dist 59, Meta Di Sorrento, Naples, Italy
[17] Univ Salerno, Postgrad Sch Internal Med, Salerno, Italy
[18] LN Ctr, Scafati, Salerno, Italy
[19] ASL, Allergy Unit, Sanit Dist 12, Caserta, Italy
[20] ASL Sanit Dist, Avellino, Italy
[21] GS Ctr, Salerno, Italy
[22] Diagnost Ctr Basile, Naples, Italy
[23] Reg Environm Protect Agcy Campania Region ARPAC, Air Pollut Unit, Caserta, Italy
[24] Univ Roma Tor Vergata, Dept Expt Med, Resp Med Unit, Rome, Italy