[1] Grp Hosp Pitie Salpetriere, Serv Pneumol & Reanimat, Paris, France
[2] Univ Paris 6 Pierre & Marie Curie, AP HP, Paris, France
[3] INSERM, UMRS 1158, Paris, France
[4] Pierre & Marie Curie Univ, INSERM, Paris, France
[5] CHU Dupuytren, Reanimat Polyvalente, Limoges, France
[6] CHU Estaing, Reanimat Polyvalente, Clermont Ferrand, France
[7] CHRU Caen, Serv Reanimat Med, Caen, France
[8] CHU Angers, Reanimat Med, Angers, France