[1] Univ Autonoma Barcelona, Fac Med, Inst Invest Biomed St Pau IB St Pau, Hosp Santa Creu & St Pau,Dept Resp Med, E-08193 Barcelona, Spain
[2] Univ Barcelona, Resp Diagnost Ctr, Dept Resp Med ICT, Hosp Clin & Prov,CIBER Enfermedades Resp,IDIBAPS, Barcelona, Spain
[3] Pharmaceut Council Catalunya, Barcelona, Spain
[4] Official Coll Pharmacists Barcelona COFB, Barcelona, Spain
[5] Univ Autononoma Madrid, Inst Invest Hosp Univ Princesa IISP, Catedra UAM Linde, Madrid, Spain
[6] Univ Autonoma Barcelona, Fac Med, Resp Grp Soc Catalano Med Familia & Comunitaria C, Ctr Atencio Primaria Chafarinas,Inst Catala Salut, E-08193 Barcelona, Spain
[7] Univ Oviedo, Fac Med, Inst Nacl Silicosis, Hosp Univ Cent Asturias, Oviedo, Spain