[1] Hosp Univ Ramon y Cajal, Serv Neumol, IRYCIS, Madrid, Spain
[2] Hosp Univ A Coruna, Serv Neumol, La Coruna, Spain
[3] Inst Invest Hosp Univ La Paz IdiPAZ, Serv Alergia, Madrid, Spain
[4] Hosp Santa Creu & Sant Pau, Serv Neumol & Alergia, Barcelona, Spain
[5] Ctr Salud Francia, Madrid, Spain
[6] Hosp Santa Creu & Sant Pau, Serv Neumol & Alergia, Barcelona, Spain
[7] Inst Invest Biomed St Pau IIB St Pau, Barcelona, Spain
[8] Univ Autonoma Barcelona, Dept Med, Fac Med, Barcelona, Spain
[9] CIBER Enfermedades Resp CIBERES, Barcelona, Spain