- Correspondence to Mrs A J Videler, Department of Rehabilitation, A01-415, Academic Medical Center, University of Amsterdam, PO Box 22660, 1100 DD Amsterdam, The Netherlands;
- Received 26 June 2009
- Revised 18 November 2009
- Accepted 25 November 2009
- Published in print 1 August 2010.
- Published online 3 August 2010.
- Published first 18 June 2010.
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