1. Department of Critical Care Medicine, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA.
2. Department of Neurology, and University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA.
3. Department of Emergency Medicine, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA.
4. Department of Internal Medicine, and Rush University Medical Center, Chicago, Illinois, USA.
5. Division of Neurocritical Care and Emergency Neurology, Yale School of Medicine, New Haven, Connecticut, USA.
6. Department of Neurological Sciences, Rush University Medical Center, Chicago, Illinois, USA.
7. Palliative Care Program, Department of Medicine, Johns Hopkins Bayview Medical Center, Baltimore, Maryland, USA.
8. Department of Neurology, Johns Hopkins Hospital, Baltimore, Maryland, USA.
9. Department of Neurology, University of Massachusetts Chan Medical School, Worcester, Massachusetts, USA.
10. Department of Anesthesia/Critical Care, and University of Massachusetts Chan Medical School, Worcester, Massachusetts, USA.
11. Department of Surgery, University of Massachusetts Chan Medical School, Worcester, Massachusetts, USA.
12. Department of Medicine and Palliative Care Program, Duke University Hospital, Durham, North Carolina, USA.
13. Departments of Internal Medicine and Neurology, Cedars-Sinai Medical Center, Los Angeles, California, USA.