Matthew T. Tull, PhD, is associate professor and director of anxiety disorders research in the department of psychiatry and human behavior at the University of Mississippi Medical Center. He has published numerous articles and chapters on emotion regulation and anxiety disorders, with a particular emphasis on panic disorder, generalized anxiety disorder (GAD), and post traumatic stress disorder. Kim L. Gratz, PhD, is associate professor in the department of psychiatry and human behavior at the University of Mississippi Medical Center, where she serves as director of personality disorders research and director of the dialectical behavior therapy (DBT) clinic. In 2005, Gratz received the Young Investigator Award of the National Education Alliance for Borderline Personality Disorder. Gratz has written numerous journal articles and book chapters on borderline personality disorder, deliberate self harm, and emotion regulation, and is coauthor of several books, including The Borderline Personality Disorder Survival Guide, Freedom from Self-Harm, and The Dialectical Behavior Therapy Skills Workbook for Anxiety. Gratz currently serves as principal investigator or coinvestigator on several major grants from the National Institutes of Health. Alexander L. Chapman, PhD, RPsych, is a registered psychologist and associate professor in the department of psychology at Simon Fraser University, as well as the president of the DBT Centre of Vancouver. Chapman directs the personality and emotion research laboratory, where he studies the role of emotion regulation in borderline personality disorder (BPD), self-harm, impulsivity, and other behavioral problems. His research is funded by the Canadian Institutes of Health Research and the Social Sciences and Humanities Research Council of Canada. Chapman received the Young Investigator Award of the National Education Alliance for Borderline Personality Disorder (2007), the Canadian Psychological Association's Scientist Practitioner Early Career Award, and a Career Investigator award from the Michael Smith Foundation for Health Research. He has coauthored five books, three of which received the 2012 Association for Behavioral and Cognitive Therapies Self Help Book Seal of Merit Award.