[1] Hop St Antoine, Hop Paris, Serv Reanimat Med, 184 Rue Faubourg St Antoine, F-75012 Paris, France
[2] UPMC Univ Paris 06, Sorbonne Univ, INSERM, Inst Pierre Louis Epidemiol & Sante Publ,UMR S 11, F-75013 Paris, France
[3] Univ Bergen, Dept Clin Med, Bergen, Norway
[4] Haukeland Hosp, Dept Anaesthesia & Intens Care, Bergen, Norway
[5] Hosp Ancelle Cremona, Dept Rehabil, Cremona, Italy
[6] Geriatr Res Grp, Brescia, Italy
[7] Alesund Hosp, Dept Anaesthesia & Intens Care, Alesund, Norway
[8] NTNU, Dept Circulat & Med Imaging, Trondheim, Norway
[9] Autonomous Univ Barcelona, Corporac Sanitaria Univ Parc Tauli, CIBER Enfermedades Resp, Dept Intens Care Med, Sabadell, Spain
[10] IRCCS Ist Ric Farmacol Mario Negri Villa Camozzi, Ctr Coordinamento GiViTI, Lab Epidemiol Clin, I-24020 Bergamo, Italy
[11] St Georges Univ Hosp, London, England
[12] Aarhus Univ Hosp, Dept Anaesthesia & Intens Care Med, Aarhus, Denmark
[13] Grande Osped Metropolitano Niguarda, Milan, Italy
[14] Univ Hosp, Dept Cardiol Pulmonol & Angiol, Dusseldorf, Germany
[15] Mater Misericordiae Univ Hosp, Dublin, Ireland
[16] Hosp Sao Jose, Ctr Hosp Lisboa Cent, Unidade Cuidados Intens Polivalente Neurocrit, Fac Ciencia Med Lisboa,Nova Med Sch, Lisbon, Portugal
[17] Ghent Univ Hosp, Dept Intens Care 1K12IC, Ghent, Belgium
[18] Karolinska Univ Hosp, Solna, Sweden
[19] Geneva Univ Hosp, Geneva, Switzerland
[20] Univ Utrecht, Univ Med Ctr, Dept Intens Care, Utrecht, Netherlands
[21] Jagiellonian Univ, Med Coll, Intens Care & Perioperat Med Div, Krakow, Poland
[22] Kardinal Schwarzenberg Hosp, Schwarzach, Austria
[23] Gen Hosp Larissa, Intens Care Unit, Larisa, Greece