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Submitted on: 02 November 2016.
Revised on: 09 February 2017.
Accepted on: 19 February 2017.
___________________Global Spine Journal---SAGE PUBLICATIONS LTD
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Submitted on: 12 May 2006.
Revised on: 30 July 2006.
Accepted on: 23 September 2006.
___________________Global Spine Journal---SAGE PUBLICATIONS LTD
Submitted on: 03 October 2004.
Revised on: 12 December 2004.
Accepted on: 15 January 2005.
___________________Global Spine Journal---SAGE PUBLICATIONS LTD
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