Submitted on: 29 July 1999.
Revised on: 25 August 1999.
Accepted on: 02 October 1999.
___________________Australasian Emergency Care---ELSEVIER SCI LTD
Submitted on: 09 November 2016.
Revised on: 13 February 2017.
Accepted on: 06 March 2017.
___________________Australasian Emergency Care---ELSEVIER SCI LTD
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Submitted on: 21 February 1998.
Revised on: 05 June 1998.
Accepted on: 23 July 1998.
___________________Australasian Emergency Care---ELSEVIER SCI LTD
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