[1] Univ New South Wales, Med Fac, Sydney, NSW, Australia
[2] Princess Alexandra Hosptial, Clin Toxicol & Emergency Med, Brisbane, Qld, Australia
[3] Univ Sydney, Clin Pharmacol, Sydney, NSW, Australia
[4] Prince Wales Hosptial, Clin Toxicol & Emergency Med, Sydney, NSW, Australia
[5] Sydney Childrens Hosp Westmead, New South Wales Poisons Informat Ctr, Sydney, NSW, Australia