Submitted on: 22 June 2009.
Revised on: 19 August 2009.
Accepted on: 15 October 2009.
___________________Clinical Spine Surgery---LIPPINCOTT WILLIAMS & WILKINS
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Submitted on: 28 September 2013.
Revised on: 17 November 2013.
Accepted on: 11 January 2014.
___________________Clinical Spine Surgery---LIPPINCOTT WILLIAMS & WILKINS
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Submitted on: 07 July 2024.
Revised on: 15 October 2024.
Accepted on: 08 December 2024.
___________________Clinical Spine Surgery---LIPPINCOTT WILLIAMS & WILKINS