1. Prince of Wales Hospital; Emergency Department and Clinical Toxicology Unit; Barker Street Randwick NSW Australia 2031
2. University of Sydney; Department of Pharmacology; Camperdown NSW Australia
3. Copenhagen Trial Unit, Centre for Clinical Intervention Research, Department 7812, Rigshospitalet, Copenhagen University Hospital; Cochrane Hepato-Biliary Group; Blegdamsvej 9 Copenhagen Denmark DK-2100
4. Rigshospitalet; Paediatric Department 4072; Blemdagsvej 9 Copenhagen Denmark 2100 Ø