- Correspondence to Dr A Pestronk, Department of Neurology, Washington University in St Louis School of Medicine, 660 South Euclid Avenue, Box 8111, St Louis, MO 63110, USA;
- Received December 9, 2009
- Revised March 16, 2010
- Accepted March 21, 2010
- First published June 25, 2010.
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