- Correspondence to: Dr Michael S Okun, University of Florida McKnight Brain Institute, Department of Neurology and Neurosurgency, 100 S Newell Drive, Gainesville, FL 32610, USA;
- Received December 31, 2002
- Accepted May 2, 2003
- Revised March 26, 2003
- First published November 14, 2003.
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