[1] Univ Barcelona, Hosp Clin, Allergy Sect, IRCE Inst dInvest Biomed August Pi Sunyer, C Villarroel,170, Barcelona 08036, Spain
[2] Inst Salud Carlos III, ARADyAL, Madrid, Spain
[3] Hosp Univ Ramon & Cajal, Allergy Dept, IRYCIS, Carretera Colmenar Viejo Km 9 1, Madrid 28034, Spain
[4] Hosp Clin Barcelona, Dept Hematol, Barcelona, Spain
[5] Hosp Univ Ramon & Cajal, Dept Hematol, IRYCIS, Madrid, Spain