1. Department of Neurology, Bowman Gray School of Medicine, Winston-Salem, North Carolina, 27103
2. Bowman Gray School of Medicine, Director of the Comprehensive Stroke Program, North Carolina Regional Medical Program, Winston-Salem, North Carolina, 27103
3. University of California Medical School in San Francisco, 101 South Sanmateo Drive, San Mateo, California, 94401
4. Upstate Medical Centre, Syracuse, New York, and Director of Coronary Care Unit, Chief of Medicine and Director of Medical Affairs and Medical Education, Chenango Memorial Hospital, 179 North Broad Street, Norwich, New York, 13815
5. University of California School of Medicine, Chief of Surgery, San Francisco General Hospital, San Francisco, California, 94110
6. Cleveland Clinic, Cleveland, Ohio, 44106
7. Department of Neurology, Indiana University School fo Medicine, 1100 West Michigan Street, Indianapolis, Indiana, 46231
8. Division of Community and Social Psychiatry of the School of Public Health and Department of Psychiatry of Columbia University, 630 West 168th Street, New York, New York, 1032
9. University of Alabama, University Station, Birmingham, Alabama, 35223
10. Division of Neurosurgery, University of Pennsylvania School of Medicine, Hospital of the University of Pennsylvania, 34th and Spruce Streets, Philadelphia, Pennsylvania, 19104
11. University of Iowa, 115 Eighth Street, N.E., Cedar Rapids, Iowa, 52401
12. Division of Neurological Surgery, Pritzker School of Medicine of the University of Chicago, 950 East 59th Street, Chicago, Illinois, 60637