[1] Univ Genoa, IRCCS AOU San Martino IST, DIMI, Allergy & Resp Dis Clin, I-16132 Genoa, Italy
[2] Univ Palermo, Villa Sofia Cervello Hosp, Dipartimento Biomed Med Interna & Specialist, Palermo, Italy
[3] Natl Healthcare Syst, Allergy Unit, Reggio Di Calabria, Italy
[4] Univ Genoa, Biostat Unit, Dept Hlth Sci, I-16132 Genoa, Italy
[5] Univ Parma, Dept Clin & Expt Med, I-43100 Parma, Italy
[6] AOU San Luigi, Resp Dis Div, Allergy Unit, Turin, Italy
[7] IRCCS, Fdn Osped Maggiore Policlin, Clin Allergy & Immunol Unit, Milan, Italy
[8] IRCCS Fdn San Raffaele del Monte Tabor, Allergy & Immunol Dept, Milan, Italy
[9] Univ Padua, Serv Allergol, Dipartimento Med Ambientale & Salute Publ, Padua, Italy
[10] Verona Major Hosp, Allergy Serv, Verona, Italy
[11] ASL 2 Savonese, Savona, Italy
[12] Univ Florence, AOUC, Dept Biomed, Florence, Italy