- Correspondence to : Dr Bionka M A Huisstede, Department of Rehabilitation Medicine and Physical Therapy (Room H-016), Erasmus Medical Center, P.O. Box 2040, Rotterdam 3000 CA, The Netherlands;
- Received June 26, 2012
- Revised November 27, 2012
- Accepted November 27, 2012
- First published January 18, 2013.
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