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Submitted on: 30 April 2021.
Revised on: 12 May 2021.
Accepted on: 28 May 2021.
Research in Developmental Disabilities
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Submitted on: 24 June 2001.
Revised on: 22 July 2001.
Accepted on: 11 August 2001.
Research in Developmental Disabilities
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Submitted on: 03 November 2013.
Revised on: 12 December 2013.
Accepted on: 04 January 2014.
Research in Developmental Disabilities
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Submitted on: 01 September 2002.
Revised on: 19 September 2002.
Accepted on: 09 October 2002.
Research in Developmental Disabilities
Submitted on: 03 April 2010.
Revised on: 12 May 2010.
Accepted on: 21 May 2010.
Research in Developmental Disabilities