- Correspondence to Dr Hirotaka Chikuda, Department of Orthopaedic Surgery, Faculty of Medicine, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8655, Japan;
- Received October 8, 2012
- Revised December 18, 2012
- Accepted December 19, 2012
- First published February 28, 2013.
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