[1] Hosp Univ DR Peset, Neumol, Valencia 46017, Spain
[2] Hosp Cent Oviedo, Neumol, Oviedo, Spain
[3] Hosp Sagunto, Neumol, Valencia, Spain
[4] Hosp Virgen Rocio, Neumol, Seville, Spain
[5] Hosp Univ Fdn Alcorcon, Alergol, Madrid, Spain
[6] Hosp Trias & Pucol, Neumol, Barcelona, Spain
[7] Hosp Laredo, Neumol, Cantabria, Spain
[8] CAP, Valencia, Spain
[9] Hosp Univ La Fe, Neumol, Valencia, Spain
[10] Hosp Mutua Tarrasa, Neumol, Barcelona, Spain