Submitted on: 27 August 2002.
Revised on: 06 October 2002.
Accepted on: 24 November 2002.
___________________Canadian Journal of Emergency Medicine
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Submitted on: 23 February 2016.
Revised on: 30 May 2016.
Accepted on: 01 July 2016.
___________________Canadian Journal of Emergency Medicine
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Submitted on: 13 December 2006.
Revised on: 22 March 2007.
Accepted on: 11 April 2007.
___________________Canadian Journal of Emergency Medicine