[1] Natl & Kapodistrian Univ, Pediat Clin 2, Dept Allergy, Athens, Greece
[2] Maastricht Univ Med Ctr, Dept Resp Med, Maastricht, Netherlands
[3] Transylvania Univ, Dept Allergy & Clin Immunol, Brasov, Romania
[4] Karolinska Inst, Dept Med Epidemiol & Biostat, Stockholm, Sweden
[5] CNR, Ist Biomed, Palermo, Italy
[6] CNR, Rome, Italy
[7] Univ Med Ctr, Utrecht, Netherlands
[8] Univ Gothenburg, Sahlgrenska Acad, Krefting Res Ctr, Gothenburg, Sweden
[9] Univ Hosp, Montpellier, France
[10] Univ Genoa, Allergy & Resp Dept, Genoa, Italy
[11] Ghent Univ Hosp, Dept Otorhinolaryngol, B-9000 Ghent, Belgium
[12] Natl Hosp Norway, Oslo Univ Hosp, Oslo, Norway
[13] Univ Amsterdam, Acad Med Ctr, Dept Otorhinolarygol, NL-1105 AZ Amsterdam, Netherlands
[14] Severo Ochoa Hosp, Dept Pediat, Madrid, Spain
[15] Helsinki Univ Hosp, Skin & Allergy Hosp, Dept Allergy, Helsinki, Finland
[16] Univ Southampton, Resp Cell & Mol Biol Res Div, Southampton SO9 5NH, Hants, England
[17] Univ London Imperial Coll Sci Technol & Med, Natl Heart & Lung Inst, London SW7 2AZ, England
[18] Med Univ Lodz, Dept Immunol, Lodz, Poland
[19] Charles Univ Prague, Fac Med, Dept Allergol & Immunol, Plzen, Czech Republic
[20] CIBERES, IDIBAPS, Hosp Clin, ENT Dept, Barcelona, Catalonia, Spain
[21] Childrens Hosp La Fe, Pediat Allergy Unit, Valencia, Spain
[22] Odense Univ Hosp, Dept Dermatol, DK-5000 Odense, Denmark
[23] Marmara Univ Med Fac, Div Pediat Allergy & Immunol, Istanbul, Turkey
[24] Med Univ, Alexandrovska Hosp, Clin Ctr Allergol, Sofia, Bulgaria
[25] Acad Athens, Biomed Res Fdn, Athens, Greece
[26] Ctr Allergy & Immunol, Tbilisi, Georgia
[27] Univ Zagreb, Sveti Duh Gen Hosp, Dept Clin Immunol Pulmonol & Rheumatol, HR-10002 Zagreb, Croatia
[28] Univ Coimbra, Coimbra, Portugal
[29] Finnish Inst Occupat Hlth, Helsinki, Finland
[30] Allergy Ctr Charite, Dept Dermatol & Allergy, Berlin, Germany