1. Division of Pulmonary, Critical Care and Sleep Medicine, The IPAL-ICU Project, Mount Sinai School of Medicine, New York, New York.
2. Service de Réanimation Médicale Groupe de Recherche Respiratoire en Réanimation Onco-Hématologique Groupe de Recherche Famiréa Hôpital Saint-Louis, Université Paris VII Paris, France.
3. Departments of Medicine and Pulmonary and Critical Care Medicine, Harborview Medical Center, University of Washington, Seattle, Washington.
4. Department of Surgery and Division of Surgical Critical Care, UMDNJ-NJMS, Newark, New Jersey.
5. Department of Palliative Medicine, Hartford Hospital, Hartford, Connecticut.
6. Department of Physiological Nursing University of California, San Francisco, San Francisco, California.
7. Pulmonary and Critical Care Section, Department of Internal Medicine, Yale School of Medicine, Yale-New Haven Hospital, New Haven, Connecticut.