[1] Ghent Univ Hosp, Dept Intens Care Med, B-9000 Ghent, Belgium
[2] Ghent Univ Hosp, Dept Geriatr, B-9000 Ghent, Belgium
[3] Ghent Univ Hosp, Dept Med Oncol, B-9000 Ghent, Belgium
[4] Hop St Louis, Med ICU, Paris, France
[5] Univ Paris 07, Paris, France
[6] Univ Hosp Geneva, Dept Intens Care, Geneva, Switzerland
[7] Univ Geneva, Geneva, Switzerland
[8] Hadassah Hebrew Univ, Sch Nursing, Jerusalem, Israel
[9] Tuttlingen Hosp, Dept Anaesthesiol & Crit Care Med, Tuttlingen, Germany
[10] Ctr Hosp Porto, Hosp Santo Antonio, Serv Cuidados Intens 1, Oporto, Portugal
[11] Med Univ Gdansk, Dept Anaesthesiol & Intens Therapy, Gdansk, Poland
[12] Imperial Coll NHS Trust, Charing Cross Hosp, Ctr Perioperat Med & Crit Care Res, London, England
[13] Inst Jules Bordet, Serv Soins Intensifs Medicochirurg & Oncol Thorac, B-1000 Brussels, Belgium
[14] Univ Groningen, Univ Med Ctr Groningen, Dept Med Oncol, NL-9713 AV Groningen, Netherlands
[15] Mater Dei Hosp, Dept Anaesthesia, Msida, Malta
[16] Univ Ghent, Dept Appl Math & Comp Sci, B-9000 Ghent, Belgium