1 Department of Medicine (Kobylianskii, Kumachev), University of Toronto; Division of Emergency Medicine, Department of Medicine (Austin), University of Toronto; Ontario Poison Centre (Austin), Hospital for Sick Children; Division of Clinical Pharmacology and Toxicology, Department of Medicine (Wu), University of Toronto; Division of General Internal Medicine, Department of Medicine (Wu), University of Toronto, Ont. jane.kobylianskii@mail.utoronto.ca.
2 Department of Medicine (Kobylianskii, Kumachev), University of Toronto; Division of Emergency Medicine, Department of Medicine (Austin), University of Toronto; Ontario Poison Centre (Austin), Hospital for Sick Children; Division of Clinical Pharmacology and Toxicology, Department of Medicine (Wu), University of Toronto; Division of General Internal Medicine, Department of Medicine (Wu), University of Toronto, Ont.