[1] Univ Navarra Clin, Dept Allergy & Clin Immunol, Pamplona 31008, Spain
[2] Univ Barcelona, Hosp Clin, Dept Pneumol, Allergy Unit, Barcelona, Spain
[3] Inst Invest Biomed August Pi & Sunyer IDIBAPS, Barcelona, Spain
[4] Univ Autonoma Barcelona, Dermatol Dept, Hosp del Mar, E-08193 Barcelona, Spain
[5] Hosp Univ Basurto, Dept Allergy, Bilbao, Spain
[6] Univ Autonoma Barcelona, Allergy Sect, Dept Med, Hosp Vall dHebron, E-08193 Barcelona, Spain
[7] Hosp Univ 12 Octubre, Dept Dermatol, Madrid, Spain
[8] Hosp Gen Univ Alicante, Dermatol Dept, Alicante, Spain
[9] Fdn Jimenez Diaz, Allergy Dept, E-28040 Madrid, Spain
[10] Hosp Arnau Vilanova, Dept Dermatol, Valencia, Spain
[11] Univ Barcelona, Hosp Clin ICT, Pneumol & Resp Dept, Allergy Unit, Barcelona, Spain