1 Unidad de Pacientes Críticos, Departamento de Medicina, Hospital Clínico Universidad de Chile, Santiago, Chile.
2 Division of Respirology and Critical Care Medicine, Department of Medicine, University Health Network and Sinai Health System, Toronto, Canada.
3 Medical Surgical Neuro ICU, Toronto Western Hospital, University Health Network, Toronto, Canada.
4 Interdepartmental Division of Critical Care Medicine, University of Toronto, Toronto, Canada.
5 Interdepartmental Division of Critical Care Medicine, University of Toronto, Toronto, Canada. laurent.brochard@unityhealth.to.
6 Keenan Research Centre for Biomedical Science, Li Ka Shing Knowledge Institute, Unity Health Toronto, Toronto, Canada. laurent.brochard@unityhealth.to.