Submitted on: 27 April 2011.
Revised on: 08 July 2011.
Accepted on: 26 August 2011.
___________________BIOLOGICAL PSYCHOLOGY---ELSEVIER
Submitted on: 18 April 2006.
Revised on: 07 August 2006.
Accepted on: 02 October 2006.
___________________BIOLOGICAL PSYCHOLOGY---ELSEVIER
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Submitted on: 21 July 2006.
Revised on: 17 November 2006.
Accepted on: 01 January 2007.
___________________BIOLOGICAL PSYCHOLOGY---ELSEVIER
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Submitted on: 20 April 2005.
Revised on: 12 August 2005.
Accepted on: 23 September 2005.
___________________BIOLOGICAL PSYCHOLOGY---ELSEVIER
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