[1] Hosp Univ Vall dHebron, Vall dHebron Inst Recerca VHIR, Serv Neumol, Vall dHebron Barcelona Hosp Campus, Barcelona, Spain
[2] Inst Salud Carlos III, CIBER Enfermedades Resp CIBERES, Madrid, Spain
[3] Univ Complutense Madrid, Serv Neumol, Hosp Clin San Carlos, Dept Med,Fac Med,Inst Invest Sanitaria,Hosp Clin, Madrid, Spain
[4] Ctr Salud Francia, Madrid, Spain
[5] Hosp Univ Mutua Terrassa, Serv Med Interna, Terrassa, Spain
[6] Ctr Salud Najera, La Rioja, Spain
[7] Ctr Salud Menasalbas, Toledo, Spain
[8] Hosp Univ Son Espases IdISBa, Serv Neumol, Palma De Mallorca, Spain
[9] Univ La Laguna, Hosp Univ Nuestra Senora de La Candelaria, Unidad Invest, Serv Neumol, Tenerife, Spain
[10] Univ Seville, Hosp Univ Virgen del Rocio, Inst Biomed Sevilla IBiS, Unidad Med Quirurg Enfermedades Resp, Seville, Spain
[11] Hosp San Pedro de Alcantara, Serv Neumol, Caceres, Spain
[12] Univ Barcelona, Ctr Salud Viladecans 2, Atenc Primaria Costa Ponent Inst Catala Salut,Dep, Inst Univ Invest Atencio Primaria Jordi Gol IDIAP, Barcelona, Spain
[13] Ctr Cochrane Iberoamer, Barcelona, Spain
[14] Univ Autonoma Madrid, Hosp Univ La Princesa, Serv Neumol, Madrid, Spain
[15] Hosp Arnau de Vilanova Lliria, Serv Neumol, Valencia, Spain