[1] Univ Barcelona UB, Inst Invest Biomed August Pi I Sunyer IDIBAPS, Barcelona, Spain
[2] Ciber Enfermedades Resp Ciberes, CB06 06 0028, Barcelona, Spain
[3] Hosp Univ Sagrat Cor, Intens Care Unit, Barcelona, Spain
[4] Gabriele dAnnunzio Univ Chieti Pescara, SS Annunziata Hosp, Sch Med & Hlth Sci, Dept Med Oral & Biotechnol Sci,Sect Anesthesia An, Chieti, Italy
[5] Univ Genoa, Dipartimento Sci Chirurg & Diagnost Integrate DIS, Genoa, Italy
[6] Hosp Clin Barcelona, Resp Inst, Pulm & Crit Care Unit, Barcelona 08036, Spain