1 Keenan Research Centre for Biomedical Science, Li Ka Shing Knowledge Institute, Unity Health Toronto, 209 Victoria St, Toronto, ON, M5B 1T8, Canada. Laurent.brochard@unityhealth.to.
2 Interdepartmental Division of Critical Care, University of Toronto, Toronto, Canada. Laurent.brochard@unityhealth.to.
3 Médecine Intensive - Réanimation et Médecine Hyperbare, CHU Angers, Angers, France.