1. Assistant Professor, Department of Anesthesiology, Dalhousie University, and Research Fellow and Psychologist, Division of Pediatric Anesthesiology, IWK Health Centre, Halifax, Nova Scotia, Canada.
2. Chair and Professor, Department of Anesthesiology and Perioperative Care, Professor, Departments of Pediatrics and Psychiatry, and Associate Dean of Clinical Research, University of California, Irvine, and Department of Pediatrics, Children's Hospital of Orange County, Orange, California, and Adjunct Professor, Department of Child Psychiatry, Yale University, New Haven, Connecticut.