- Correspondence to Dr S Sandell, Department of Neurology, Seinäjoki Central Hospital, Hanneksenrinne 7, 60220 Seinäjoki, Finland;
- Received 21 August 2009
- Revised 9 December 2009
- Accepted 23 December 2009
- Published in print 1 August 2010.
- Published online 3 August 2010.
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