- Correspondence to Dr Leo J Schep, National Poisons Centre, Department of Preventive and Social Medicine, University of Otago, P.O. Box 913, Dunedin 9054, New Zealand;
- Received August 6, 2013
- Revision received November 12, 2013
- Accepted November 25, 2013
- First published December 30, 2013.
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