Submitted on: 18 September 2016.
Revised on: 21 November 2016.
Accepted on: 23 December 2016.
___________________Journal of Intellectual Disabilities
Submitted on: 29 September 2019.
Revised on: 11 November 2019.
Accepted on: 23 December 2019.
___________________Journal of Intellectual Disabilities
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Submitted on: 18 March 2008.
Revised on: 05 June 2008.
Accepted on: 18 July 2008.
___________________Journal of Intellectual Disabilities
Submitted on: 24 March 2006.
Revised on: 22 April 2006.
Accepted on: 04 May 2006.
___________________Journal of Intellectual Disabilities
Submitted on: 16 February 2008.
Revised on: 23 May 2008.
Accepted on: 30 June 2008.
___________________Journal of Intellectual Disabilities
Submitted on: 13 March 2003.
Revised on: 15 June 2003.
Accepted on: 15 July 2003.
___________________Journal of Intellectual Disabilities
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