[1] Univ Paris 06, ER10, Paris, France
[2] Grp Hosp Pitie Salpetriere, Assistance Publ Hop Paris, Dept Resp & Intens Care Med, F-75651 Paris 13, France
[3] INSERM, U974, Paris, France
[4] St Eloi Hosp, Intens Care & Anesthesiol Dept, Montpellier, France
[5] Univ Montpellier I, INSERM, U1046, Montpellier, France
[6] Hop Arnaud de Villeneuve, Dept Med Informat, Montpellier, France
[7] Univ Montpellier, F-34059 Montpellier, France
[8] Hop Arnaud de Villeneuve, Dept Clin Physiol, Montpellier, France