1. Department of Anesthesia, Critical Care and Pain Medicine
2. Department of Medicine
3. Department of Radiology
4. Department of Anesthesiology, University of Maryland School of Medicine, Baltimore, Maryland; and
5. Department of Neurology, and
6. Department of Pediatrics, Massachusetts General Hospital and Harvard Medical School, Boston, Massachusetts
7. Department of Anesthesiology, Washington University in St. Louis, St. Louis, Missouri