[1] Univ Texas Hlth Sci Ctr San Antonio, San Antonio, TX 78229 USA
[2] South Texas Vet Hlth Care Syst, San Antonio, TX 78229 USA
[3] Univ Sabana, Bogota, Colombia
[4] Clin Shaio, Bogota, Colombia
[5] Univ Milano Bicocca, Clin Pneumol, Monza, Italy
[6] Univ Autonoma Barcelona, Hosp Santa Creu & St Pau, Dept Med, Serv Pneumol, E-08193 Barcelona, Spain
[7] Joan XXIII Univ Hosp, Crit Care Dept, Tarragona, Spain
[8] CIBERES, Pere Virgili Hlth Inst, Tarragona, Spain
[9] Univ Dundee, Dundee, Scotland
[10] St James Hosp, Trinity Ctr Hlth Sci, CIBERES, Dublin 8, Ireland
[11] Providence Hosp, Dept Med, Infect Dis Sect, Washington, DC USA
[12] Hosp Clin Univ, Unidad Cuidados Intens Resp, Valencia, Spain
[13] Consorci Hosp Gen Univ Valencia, Dept Pulmonol, Valencia, Spain
[14] Univ Coruna UDC, Sergas, CHUAC, Serv Neumol,Inst Invest Biomed A Coruna INIBIC, La Coruna, Spain
[15] Hosp Univ Vall dHebron, CIBERES, Crit Care Dept, Barcelona, Spain
[16] Hosp Univ Dr Negrin, CIBERES, Intens Care Unit, Las Palmas Gran Canaria, Spain