1. Union Hospital Neuroscience, Terre Haute, Indiana.
2. Division of Neurosurgery, Creighton University Medical Center, Omaha, Nebraska.
3. Department of Neurosurgery, Warren Alpert Medical School, Brown University, Providence, Rhode Island.
4. Nutonian Inc., Cambridge, Massachusetts.
5. Faculty of Engineering and Computer Science, Cornell University, Ithaca, New York.
6. The Medical Center, Bowling Green, Kentucky.