1. Department of Neurology; New York University School of Medicine; New York NY
2. Departments of Medicine and Pharmacology; Vanderbilt University; Nashville TN
3. Department of Neurology; Mayo Clinic; Rochester MN
4. Clinical Neurocardiology Section, National Institute of Neurological Disorders and Stroke, NIH; Bethesda MD
5. Department of Neurology; Beth Israel Deaconess Medical Center, Harvard Medical School; Boston MA