Gordon J. G. Asmundson, PhD, is professor and research director in the Faculty of Kinesiology and Health Studies at the University of Regina, Canada, and adjunct professor of psychiatry at the University of Saskatchewan. He has published more than 110 journal articles and book chapters, as well as several books, and served as a member of the DSM-IV Text Revision Work Group for the Anxiety Disorders. An active clinical researcher and research supervisor, Dr. Asmundson has received several prestigious early career awards. His current interests include assessment and basic mechanisms of the anxiety disorders, health anxiety, and acute and chronic pain, and the association of these with disability and behavior change.