[1] Assistance Publ Hop Paris, Hop Henri Mondor, Serv Reanimat Med, Med Intens Care Unit, F-94010 Creteil, France
[2] Univ Paris, INSERM, U492, Creteil, France
[3] Cavalle Blanche Hosp, Med Intens Care Unit, Brest, France
[4] St Pau Hosp, Intens Care Unit, Barcelona, Spain
[5] La Sapienza Univ Hosp, Intens Care Unit, Rome, Italy
[6] Croix Rousse Hosp, Med Intens Care Unit, Lyon, France
[7] St Louis Hosp, Dept Biostat, Paris, France
[8] Henri Mondor Hosp, Dept Biostat, Creteil, France