The Anxiety and Depression Association of America (ADAA) is a U.S. nonprofit organization dedicated to increasing awareness and improving the diagnosis, treatment, and cure of anxiety disorders in children and adults. Anxiety disorder is the class of mental disorder in which anxiety is the predominant feature. This disorder, an illness characterized by constant and boundless worry that interferes with the daily life, is the most common psychiatric illness in the United States, affecting 40 million American adults. The Anxiety and Depression Association of America (ADAA) is involved in education, training, and research for anxiety and stress-related disorders. The mission statement of the Anxiety and Depression Association of America (ADAA) is to promote the prevention, treatment, and cure of anxiety, depression, and stress-related disorders through education, practice, and research. ADAA offers free educational information and resources about anxiety disorders, local treatment provider referrals, self-help groups, self-tests, and clinical trial listings. The organization funds scientific research through grants and awards and promote awareness that anxiety disorders are real and treatable. The organization's headquarters is located in Silver Spring, Maryland. ADAA is guided by a board of directors, scientific advisory board, and clinical advisory board, and it is supported by donations. The association holds an annual conference focused on the science and treatment of anxiety and anxiety-related disorders in children and adults. ADAA publishes self-help books such as Facing Panic, Triumph Over Shyness: Conquering Social Anxiety Disorder, in hopes of helping the estimated 40% of anxiety suffering Americans the opportunity to cope with and possibly overcome the disorder. Furthermore, anxiety stems from a complex arrangement of factors such as life experiences, personality, brain chemistry, or even genetics, so as a developing, mental disorder, anxiety requires patience to overcome. ADAA has a free online peer support community on HealthUnlocked for people with anxiety or depression.