An official website of the United States government
The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before
sharing sensitive information, make sure you’re on a federal
government site.
The site is secure.
The https:// ensures that you are connecting to the
official website and that any information you provide is encrypted
and transmitted securely.
1 Interdepartmental Division of Critical Care Sunnybrook Health Sciences Center (G.D.R.), Department of Medicine, University of Toronto, Toronto, Ontario, Canada.
2 Palliative and Advanced Illness Research (PAIR) Center, Division of Pulmonary, Allergy, and Critical Care Medicine, Department of Medicine, Department of Medical Ethics and Health Policy (S.D.H.),University of Pennsylvania, Philadelphia, Pennsylvania, USA.
1 Interdepartmental Division of Critical Care Sunnybrook Health Sciences Center (G.D.R.), Department of Medicine, University of Toronto, Toronto, Ontario, Canada.
2 Palliative and Advanced Illness Research (PAIR) Center, Division of Pulmonary, Allergy, and Critical Care Medicine, Department of Medicine, Department of Medical Ethics and Health Policy (S.D.H.),University of Pennsylvania, Philadelphia, Pennsylvania, USA.