- Correspondence to: Dr Roberto Bergamaschi Multiple Sclerosis Centre, Department of Clinical Neurology, Neurological Institute “C Mondino”, Via Mondino 2, 27100 Pavia, Italy;
- Received 17 September 2006
- Accepted 4 January 2007
- Revised 28 November 2006
- Published online 15 June 2007.
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