Martin N. Seif, PhD, is cofounder of the Anxiety and Depression Association of America (ADAA), and was a member of its board of directors from 1977 through 1991. Seif is former associate director of the Anxiety and Phobia Treatment Center at White Plains Hospital, a faculty member of New York-Presbyterian Hospital, and is board certified in cognitive behavioral psychology from the American Board of Professional Psychology. He maintains a private practice in New York, NY; and Greenwich, CT; and is coauthor of What Every Therapist Needs to Know About Anxiety Disorders and OvercomingUnwanted Intrusive Thoughts. Sally M. Winston, PsyD, is founder and codirector the Anxiety and Stress Disorders Institute of Maryland in Towson, MD. She served as the first chair of the ADAA's Clinical Advisory Board, and received their prestigious Jerilyn Ross Clinician Advocate Award. She is a master clinician who has given sought-after workshops for therapists for decades. She is coauthor of What Every Therapist Needs to Know AboutAnxiety Disorders and Overcoming Unwanted Intrusive Thoughts.