[1] S Donato Hosp, Pulmonol & Resp Intens Care Unit, I-52100 Arezzo, Italy
[2] Acad Med Ctr, Dept Intens Care, Amsterdam, Netherlands
[3] Mahidol Univ, Mahidol Oxford Trop Med Res Unit, Bangkok, Thailand
[4] Acad Med Ctr, Dept Resp Med, Amsterdam, Netherlands
[5] Autonomous Univ Barcelona, CIBER Enfermedades Resp, Corp Sanitaria Univ Parc Tauli, Sabadell, Spain