1. Clinical Toxicology Unit, Princess Alexandra Hospital, Brisbane, Australia;
2. School of Medicine, University of Queensland, Brisbane, Australia;
3. Department of Chemical Pathology, Princess Alexandra Hospital, Brisbane, Australia;
4. New South Wales Poisons Information Centre, The Children’s Hospital at Westmead, Sydney, Australia;
5. Clinical Toxicology Unit, Prince of Wales Hospital, Sydney, Australia;
6. Clinical Toxicology Research Group, The University of Newcastle, Newcastle, Australia