- Correspondence to Ruth Verrelst, Department of Rehabilitation Sciences and Physiotherapy, Faculty of Medicine and Health Sciences, Ghent University, De Pintelaan 185 3B3, Ghent 9000, Belgium;
- Received August 24, 2012
- Revised December 17, 2012
- Accepted January 16, 2013
- First published February 8, 2013.
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