Submitted on: 25 October 2001.
Revised on: 18 February 2002.
Accepted on: 03 April 2002.
___________________Addiction Science & Clinical Practice
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Submitted on: 27 June 1998.
Revised on: 02 October 1998.
Accepted on: 17 October 1998.
___________________Addiction Science & Clinical Practice
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Submitted on: 17 July 2009.
Revised on: 24 August 2009.
Accepted on: 10 September 2009.
___________________Addiction Science & Clinical Practice
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Submitted on: 24 July 2001.
Revised on: 17 November 2001.
Accepted on: 08 December 2001.
___________________Addiction Science & Clinical Practice
Submitted on: 13 September 2002.
Revised on: 28 November 2002.
Accepted on: 26 December 2002.
___________________Addiction Science & Clinical Practice