[1] Viborg Reg Hosp, Dept Anaesthesia & Intens Care, Heibergs Alle 4, DK-8800 Viborg, Denmark
[2] Cent Denmark Reg, Prehosp Emergency Med Serv, Aarhus, Denmark
[3] Aarhus Univ, Dept Clin Med, Aarhus, Denmark
[4] Univ Bergen, Dept Clin Med, Bergen, Norway
[5] Univ Bergen, Dept Global Publ Hlth & Primary Care, Bergen, Norway
[6] Heinrich Heine Univ Duesseldorf, Med Fac, Dept Cardiol Pulmonol & Vasc Med, Dusseldorf, Germany
[7] Univ Utrecht, Univ Med Ctr, Dept Intens Care Med, Utrecht, Netherlands
[8] Jagiellonian Univ Med Coll, Dept Intens Care & Perioperat Med, Krakow, Poland
[9] St Georges Univ Hosp NHS Fdn Trust, Gen Intens Care, London, England
[10] UPMC Univ Paris 06, Sorbonne Univ, INSERM, UMR S 1136,Inst Pierre Louis Epidemiol & Sante Pu, Paris, France
[11] Hop St Antoine, AP HP, Serv Reanimat Med, Paris, France
[12] Hadassah Univ, Dept Med Intens Care, Med Ctr, Jerusalem, Israel
[13] Hebrew Univ Jerusalem, Hadassah Med Ctr, Gen Intens Care Unit, Jerusalem, Israel
[14] Hebrew Univ Jerusalem, Fac Med, Jerusalem, Israel
[15] Charite Univ Med Berlin, Dept Anesthesiol & Intens Care Med, Berlin, Germany
[16] Klin Bavaria, Kreischa, Germany
[17] Haukeland Hosp, Dept Anaesthesia & Intens Care, Bergen, Norway