M. Nykänen*, J. Ylinen**, A. Häkkinen**,***
*Kruunupuisto Punkaharju Rehabilitation Centre, Punkaharju, **Department of Physical and Rehabilitation Medicine, Jyväskylä Central Hospital, ***Department of Health Sciences, University of Jyväskylä, Jyväskylä, Finland
J Rehabil Med 2007; 39: 363-365.
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