About the Authors

Christopher I. Johnston

Affiliations School of Medicine Sydney, University of Notre Dame Australia, Darlinghurst, New South Wales, Australia, NSW Poisons Information Centre, Sydney Children's Hospital Network, Sydney, New South Wales, Australia

Margaret A. O'Leary

Affiliation Department of Clinical Toxicology and Pharmacology, Calvary Mater Newcastle and the Discipline of Clinical Pharmacology, University of Newcastle, Newcastle, New South Wales, Australia

Simon G. A. Brown

Affiliation Centre for Clinical Research in Emergency Medicine, Western Australian Institute for Medical Research, Royal Perth Hospital and University of Western Australia, Perth, Western Australia, Australia

Bart J. Currie

Affiliation Menzies School of Health Research and Northern Territory Clinical School, Royal Darwin Hospital, Darwin, Northern Territory, Australia

Lambros Halkidis

Affiliation Emergency Department, Cairns Base Hospital, Cairns, Queensland, Australia

Richard Whitaker

Affiliation Emergency Department, Cairns Base Hospital, Cairns, Queensland, Australia

Benjamin Close

Affiliation Emergency Department, The Townsville Hospital, Townsville, Queensland, Australia

Geoffrey K. Isbister

geoff.isbister@gmail.com

Affiliations NSW Poisons Information Centre, Sydney Children's Hospital Network, Sydney, New South Wales, Australia, Department of Clinical Toxicology and Pharmacology, Calvary Mater Newcastle and the Discipline of Clinical Pharmacology, University of Newcastle, Newcastle, New South Wales, Australia

for the ASP investigators

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: CIJ SGAB GKI. Performed the experiments: CIJ MAO. Analyzed the data: CIJ GKI. Contributed reagents/materials/analysis tools: MAO. Wrote the paper: CIJ MAO SGAB BJC LH RW BC GKI. Recruitment of patients at hospital sites: SGAB BC LH RW GKI.