[1] Corp Sanitaria, Crit Care Ctr, Hosp Sabadell, Sabadell, Spain
[2] Hosp El Cruce, Grp Trabajo Fisiopatol Pulm Expt, Catedra Fisiol, FCM,UNLP, Buenos Aires, DF, Argentina
[3] Fdn Favaloro, Buenos Aires, DF, Argentina
[4] Clin Bazterrica, Buenos Aires, DF, Argentina
[5] Clin Santa Isabel, Buenos Aires, DF, Argentina
[6] ISCiii, CIBER Enfermedades Resp, Madrid, Spain
[7] Univ Autonoma Barcelona, Fundacio Parc Tauli, Corp Sanitaria, Univ Parc Tauli, Sabadell, Spain
[8] Univ Trieste, Dipartimento Med Perioperatoria, Osped Cattinara, I-34127 Trieste, Italy
[9] Hosp Univ Dr Negrin, MODERN, Res Unit, Las Palmas Gran Canaria, Spain
[10] Massachusetts Gen Hosp, Boston, MA 02114 USA
[11] Harvard Univ, Sch Med, Boston, MA USA