American Psychiatric Association

The American Psychiatric Association (APA) is the main professional organization of psychiatrists and trainee psychiatrists in the United States, and the most influential world-wide. Its some 148,000 members are mainly American but some are international. The association publishes various journals and pamphlets, as well as the Diagnostic and Statistical Manual of Mental Disorders, or DSM. The DSM codifies psychiatric conditions and is used world-wide as a key guide to diagnosing disorders.
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