Submitted on: 25 April 1999.
Revised on: 24 May 1999.
Accepted on: 29 June 1999.
___________________Journal of Neurosurgery-Pediatrics
Submitted on: 14 June 2001.
Revised on: 29 August 2001.
Accepted on: 26 October 2001.
___________________Journal of Neurosurgery-Pediatrics
Submitted on: 20 February 2002.
Revised on: 01 April 2002.
Accepted on: 16 May 2002.
___________________Journal of Neurosurgery-Pediatrics
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Submitted on: 05 May 2013.
Revised on: 26 August 2013.
Accepted on: 20 September 2013.
___________________Journal of Neurosurgery-Pediatrics
Submitted on: 11 September 2017.
Revised on: 24 December 2017.
Accepted on: 02 February 2018.
___________________Journal of Neurosurgery-Pediatrics
Submitted on: 31 May 1998.
Revised on: 06 July 1998.
Accepted on: 19 July 1998.
___________________Journal of Neurosurgery-Pediatrics
Submitted on: 04 November 2012.
Revised on: 28 February 2013.
Accepted on: 30 March 2013.
___________________Journal of Neurosurgery-Pediatrics