1. Department of Physiology and Pharmacology, Schulich School of Medicine and Dentistry, and
2. Ivey Chair in Molecular Toxicology, Western University, London, Ontario, Canada;
3. Head & Neck Surgery Division, Department of Surgery-Otolaryngology, McMaster University Medical Centre, Hamilton, Ontario, Canada; and
4. Division of Clinical Pharmacology and Toxicology, Department of Pediatrics, The Hospital for Sick Children, University of Toronto, Toronto, Ontario, Canada