1. Department of Psychology and Neuroscience, Boston College, Chestnut Hill, Massachusetts, USA.
2. Department of Psychology, University of Massachusetts Lowell, Lowell, Massachusetts, USA.
3. Harvard Medical School and Spaulding Rehabilitation Hospital, Charlestown, Massachusetts, USA.
4. Departments of Neurosurgery and Neurology, Medical College of Wisconsin, Milwaukee, Wisconsin, USA.
5. University of Washington, Seattle, Washington, USA.
6. Moss Rehabilitation Research Institute, Elkins Park, Pennsylvania, USA.
7. University of California, San Francisco, San Francisco, California, USA.