- Correspondence to:
Associate Professor Susan Prescott
School of Paediatrics and Child Health Research, University of Western Australia, PO Box D184, Princess Margaret Hospital, Perth, WA 6840, Australia;
- Accepted 17 November 2004
- Published in print 1 September 2005.
- Published online 19 August 2005.
- Published first 29 April 2005.
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