- Correspondence to:
Dr R J Hancox
Dunedin Multidisciplinary Health and Development Research Unit, Department of Preventive and Social Medicine, Dunedin School of Medicine, University of Otago, PO Box 913, Dunedin, New Zealand;
- Received May 20, 2003
- Accepted December 23, 2003
- First published April 28, 2004.
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