- Professor J Jankovic, Movement Disorders Clinic, Department of Neurology, Baylor College of Medicine, 6550 Fannin, Suite 1801, Houston, Texas 77030–3498, USA. Telephone 001 713 798 5998; fax 001 713 798 6808.
- Received December 19, 1997
- Revised April 29, 1998
- Accepted May 2, 1998
- First published November 1, 1998.
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