1. Department of Anesthesia, Critical Care, and Pain Medicine; Massachusetts General Hospital; Boston MA
2. Department of Anesthesiology; Wake Forest School of Medicine; Winston-Salem NC
3. Neurology and Pain Consultants; Advance NC (J. A. H. Porter)
4. Division of General Internal Medicine; University of Cincinnati College of Medicine; Cincinnati OH
5. Department of Neurology; Wake Forest School of Medicine; Winston-Salem NC, USA