From the Ivey Chair in Molecular Toxicology, Schulich School of Medicine and Dentistry, University of Western Ontario, London, Ontario, Canada (Mr Elzagallaai, Dr Koren); Department of Medicine, University of Western Ontario, London, Ontario, Canada (Mr Elzagallaai, Dr Koren); Department of Physiology and Pharmacology, University of Western Ontario, London, Ontario, Canada (Mr Elzagallaai, Dr Rieder, Dr Koren); Department of Pediatrics, Schulich School of Medicine and Dentistry, University of Western Ontario, London, Ontario, Canada (Dr Rieder); and the CIHR-GSK Chair in Pediatric Clinica Pharmacology,University of Western Ontario, London, Ontario,Canada (Dr Rieder). Submitted for publication October 18, 2009; revised version accepted February 9, 2010. Address for correspondence: Gideon Koren MD, FRCPC, FACMT, Ivey Chair in Molecular Toxicology, Department of Physiology and Pharmacology, Schulich School of Medicine and Dentistry, University of Western Ontario, London, Ontario, Canada N6A 5C1; e-mail: [email protected].