Submitted on: 25 September 1999.
Revised on: 27 December 1999.
Accepted on: 07 February 2000.
___________________JOURNAL OF NEUROSURGERY---AMER ASSOC NEUROLOGICAL SURGEONS
Submitted on: 05 April 2008.
Revised on: 28 April 2008.
Accepted on: 24 May 2008.
___________________JOURNAL OF NEUROSURGERY---AMER ASSOC NEUROLOGICAL SURGEONS
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Submitted on: 11 April 2014.
Revised on: 31 May 2014.
Accepted on: 27 July 2014.
___________________JOURNAL OF NEUROSURGERY---AMER ASSOC NEUROLOGICAL SURGEONS
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Submitted on: 08 March 2016.
Revised on: 21 April 2016.
Accepted on: 08 May 2016.
___________________JOURNAL OF NEUROSURGERY---AMER ASSOC NEUROLOGICAL SURGEONS
Submitted on: 28 November 2017.
Revised on: 28 January 2018.
Accepted on: 10 February 2018.
___________________JOURNAL OF NEUROSURGERY---AMER ASSOC NEUROLOGICAL SURGEONS
Submitted on: 02 July 2001.
Revised on: 27 October 2001.
Accepted on: 21 November 2001.
___________________JOURNAL OF NEUROSURGERY---AMER ASSOC NEUROLOGICAL SURGEONS
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