Submitted on: 31 July 2007.
Revised on: 23 September 2007.
Accepted on: 19 November 2007.
___________________JOURNAL OF ORTHOPAEDIC RESEARCH
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Submitted on: 29 August 2013.
Revised on: 23 December 2013.
Accepted on: 22 January 2014.
___________________JOURNAL OF ORTHOPAEDIC RESEARCH
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