[1] Univ Naples 2, IMMM, CNR, I-00133 Rome, Italy
[2] Santiago Apostol Hosp, Dept Allergy & Immunol, Santiago, Spain
[3] Univ London Imperial Coll Sci Technol & Med, Natl Heart & Lung Inst, Dept Allergy & Clin Immunol, London, England
[4] Univ Southampton, Southampton Gen Hosp Infect, Inflammat & Repair Div, Sch Med, Southampton, Hants, England
[5] Univ Gothenburg, Dept Resp Med & Allergol, Gothenburg, Sweden
[6] Polyclin Hospitalier Brothers St John Of God, Dept Allergy & Clin Immunol, Budapest, Hungary
[7] Med Univ Sofia, Clin Ctr Allergol, Sofia, Bulgaria
[8] UEMS, Allergol & Clin Immunol Sect, Tarbes, France
[9] Univ Rotterdam Hosp, Dept Allergol, Rotterdam, Netherlands
[10] LGD Hosp Athens, Dept Allergy & Clin Immunol, Div Internal Med, Athens, Greece
[11] Med Univ Lodz, Dept Clin Immunol & Allergy, Lodz, Poland
[12] Univ Coimbra, Ctr Pneumol, Serv Immunoalergia, Coimbra, Portugal
[13] Univ Med Berlin, Allergy Ctr Charite, Dept Dermatol & Allergy, Berlin, Germany