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Submitted on: 12 July 2003.
Revised on: 02 October 2003.
Accepted on: 28 October 2003.
___________________JOURNAL OF NEUROSURGERY-SPINE---AMER ASSOC NEUROLOGICAL SURGEONS
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Submitted on: 08 January 1999.
Revised on: 28 January 1999.
Accepted on: 27 March 1999.
___________________JOURNAL OF NEUROSURGERY-SPINE---AMER ASSOC NEUROLOGICAL SURGEONS
Submitted on: 23 July 2001.
Revised on: 16 September 2001.
Accepted on: 09 November 2001.
___________________JOURNAL OF NEUROSURGERY-SPINE---AMER ASSOC NEUROLOGICAL SURGEONS
Submitted on: 05 May 2014.
Revised on: 03 June 2014.
Accepted on: 15 June 2014.
___________________JOURNAL OF NEUROSURGERY-SPINE---AMER ASSOC NEUROLOGICAL SURGEONS
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