- Correspondence to Professor Teppo LN Järvinen, Department of Orthopaedics and Traumatology, University of Helsinki and Helsinki University Hospital, Töölö Hospital, Topeliuksenkatu 5, Helsinki 00260, Finland;
- Received January 19, 2017
- Revised April 3, 2017
- Accepted April 13, 2017
- First published May 18, 2017.
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