1. New York Medical College, Hartsdale, New York;
2. University of Minnesota School of Medicine, Minneapolis, Minnesota;
3. Mount Sinai School of Medicine, New York, New York;
4. Wayne State University School of Medicine, Detroit, Michigan;
5. Sky Lakes Medical Center, Klamath Falls, Oregon;
6. University of Michigan Medical School, Ann Arbor, Michigan;
7. New York Presbyterian Hospital, New York, New York;
8. Chicago Institute of Neurosurgery and Neuroresearch, Chicago, Illinois;
9. Metropolitan Medical Center, New York, New York;
10. State University of New York Downstate Medical Center, Brooklyn, New York;
11. Sutter Neuroscience Institute, Sacramento, California
12. Elmhurst Hospital Center, Elmhurst, New York; and