[1] Univ Paris 12, AP HP, Hop Henri Mondor, U615, F-94010 Creteil, France
[2] Western Gen Hosp, Intens Care Unit, Edinburgh EH4 2XU, Midlothian, Scotland
[3] Hop St Louis, Intens Care Unit, Paris, France
[4] Univ Cattolica Sacro Cuore, Dept Intens Care & Anesthesiol, I-00168 Rome, Italy
[5] Royal Perth Hosp, Intens Care Unit, Perth, WA, Australia
[6] Hop Europeen Georges Pompidou, Intens Care Unit, Paris, France
[7] Vivantes Klinikum Neukoelln, Dept Anesthesiol, Berlin, Germany
[8] Vrije Univ Amsterdam, Med Ctr, Intens Care Unit, Amsterdam, Netherlands
[9] Hosp Santa Creu & Sant Pau, Intens Care Unit, Barcelona, Spain
[10] Univ Hosp Vienna, Dept Anesthesia & Gen Intens Care Med, A-1090 Vienna, Austria
[11] Fdn S Maugeri, Intens Care Med Unit, Pavia, Italy
[12] Univ Pittsburgh, Med Ctr, Intens Care Unit, Pittsburgh, PA USA
[13] Univ Ulm, Sch Med, Dept Anesthesia, Ulm, Germany
[14] Univ Hosp Le Kremlin Bicetre, Intens Care Unit, Le Kremlin Bicetre, France
[15] Addenbrookes Hosp, Pediat Intens Care Unit, Cambridge, England
[16] Univ Hosp Geneva, Intens Care Unit, Geneva, Switzerland