1. Division of Neurocritical Care, Departments of Neurology, Neurosurgery, and Anesthesiology and Critical Care Medicine, Johns Hopkins University School of Medicine, Baltimore, Maryland
2. Neuroscience Intensive Care Unit, Department of Medicine, Virginia Commonwealth University, Inova Fairfax Medical Campus, Falls Church, Virginia
3. Neuroscience Research, Neuroscience and Spine Institute, Inova Fairfax Medical Campus, Falls Church, Virginia
4. Department of Cardiac Surgery, Johns Hopkins University School of Medicine, Baltimore, Maryland
5. Heart and Vascular Institute, Cleveland Clinic, Cleveland, Ohio
6. Neurological Institute, Cleveland Clinic, Cleveland, Ohio