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A disorder characterized by persistent or recurrent symptoms other than pain
that are mediated by the autonomic nervous system and not a part of a general
medical condition. Symptoms may involve various systems or organs including
palpitations (cardiovascular), hyperventilation (respiratory), vomiting
(gastrointestinal), urinary frequency (urogenital), or flushing (dermal). In
earlier classifications (DSM-I, DSM-II, and DSM-III), such symptoms were
considered conversion symptoms, psychosomatic symptoms, or psychophysiological
disorders.
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