1. Medical ICU and
2. Biostatistics Department, St.-Louis University Hospital, Paris, France
3. Respiratory and Lung Transplant Unit, Foch Hospital, Suresnes, France
4. Medical-Surgical ICU, Avicenne University Hospital, Bobigny, France
5. Medical ICU, Angers University Hospital, Angers, France
6. Medical ICU, Lyon University Hospital, Lyon, France
7. Respiratory Unit and
8. Medical ICU, Pitié Salpêtrière Hospital, Paris, France
9. Medical ICU, Nancy University Hospital, Nancy, France
10. Medical ICU, Cochin University Hospital, Paris, France
11. Medical-Surgical ICU, Roubaix Hospital, Roubaix, France
12. Medical-Surgical ICU, Versailles Hospital, Le Chesnay, France
13. Medical ICU, Montpellier University Hospital, Montpellier, France; and
14. Medical-Surgical ICU, Paoli Calmettes Institute, Marseille, France