1. Division of Critical Care Medicine, Albert Einstein College of Medicine, Montefiore Medical Center, Bronx, NY 10467, USA
2. Department of Neurology, Albert Einstein College of Medicine, Montefiore Medical Center, Bronx, NY 10467, USA
3. Department of Neurological Surgery, Albert Einstein College of Medicine, Montefiore Medical Center, Bronx, NY 10467, USA
4. Department of Health Policy and Management, Mailman School of Public Health, Columbia University, New York, NY 10032, USA
5. Department of Neurosurgery, Division of Neurocritical Care, UCLA David Geffen School of Medicine, Ronald Reagan Medical Center, Los Angeles, CA 90095, USA
6. Department of Neurology, University of Washington, Seattle, WA 98195, USA