- Correspondence to Rob PA Janssen, Orthopaedic Center Máxima, Máxima Medical Center, Ds. Th. Fliednerstraat 1, 5631BM Eindhoven, The Netherlands;
- Received June 19, 2017
- Revised July 20, 2017
- Accepted August 15, 2017
- First published September 15, 2017.
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