[1] Univ Coll Ghent, Fac Healthcare Vesalius, Ghent, Belgium
[2] Univ Ghent, Fac Med & Hlth Sci, B-9000 Ghent, Belgium
[3] Univ Rovira & Virgili, Dept Intens Care, Joan XXIII Univ Hosp, CIBER Enfermedades Resp, Tarragona, Spain
[4] Univ Coll London Hosp Trust, Specialist Hosp, London, England
[5] Hosp Garcia de Orta, Dept Intens Care, Almada, Portugal
[6] SMZ Sud Kaiser Franz Josef Spital, Med Abt Infekt & Tropenmed, Vienna, Austria
[7] Vrinnevisjukhuset, Dept Anaesthesia & Intens Care, Norrkoping, Sweden
[8] Hacettepe Univ, Intens Care Unit, Ankara, Turkey
[9] Semmelweis Univ, Surg Intens Care Unit, H-1085 Budapest, Hungary
[10] Spital Maennedorf, Intens Care Unit, Mannedorf, Switzerland
[11] Univ Athens, Dept Intens Care, Sch Med, Univ Hosp Attikon, Athens, Greece
[12] Ghent Univ Hosp, B-9000 Ghent, Belgium