1. Interdepartmental Division of Critical Care MedicineUniversity of TorontoToronto, Ontario, CanadaandDepartment of MedicineSinai Health System and University Health NetworkToronto, Ontario, Canada
2. Assistance Publique des Hôpitaux de ParisSt-Louis Teaching Hospital and Paris 7 UniversityParis, FranceandGroupe de Recherche Respiratoire en Reanimation Onco-HématologiqueParis, France