- Correspondence to Redmar J Berduszek, University of Groningen, University Medical Center Groningen, Department of Rehabilitation Medicine. Hanzeplein 1, 9713 GZ,Groningen, The Netherlands;
- Received 14 February 2017
- Revised 19 May 2017
- Accepted 30 May 2017
- Published online 8 July 2017.
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