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Submitted on: 27 November 2010.
Revised on: 02 February 2011.
Accepted on: 06 March 2011.
___________________INTERNATIONAL JOURNAL OF DRUG POLICY
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Submitted on: 31 January 2007.
Revised on: 02 March 2007.
Accepted on: 22 April 2007.
___________________INTERNATIONAL JOURNAL OF DRUG POLICY
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Submitted on: 05 September 2011.
Revised on: 27 December 2011.
Accepted on: 24 January 2012.
___________________INTERNATIONAL JOURNAL OF DRUG POLICY
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